RHSA-2026:50773
Vulnerability from csaf_redhat - Published: 2026-08-05 11:42 - Updated: 2026-08-27 13:03Summary
Red Hat Security Advisory: ruby4.0 security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for ruby4.0 is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.
Security Fix(es):
* zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)
* net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)
* ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)
* net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)
* net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)
* net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)
Bug Fix(es) and Enhancement(s):
* ruby4.0: Rebase to the latest Ruby 4.0 release [rhel-10.2.z] (JIRA:RHEL-211310)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in zlib, a Ruby interface for the zlib compression/decompression library. The Zlib::GzipReader component contains a buffer overflow vulnerability. This occurs because the zstream_buffer_ungets function does not ensure sufficient memory capacity before moving existing data, which can lead to memory corruption. An attacker could potentially exploit this to cause unexpected behavior or system instability.
5.6 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
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fix
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Threats
Impact
Moderate
A flaw was found in Net::IMAP, a Ruby library for Internet Message Access Protocol (IMAP) client functionality. A hostile server can exploit this vulnerability during SCRAM-SHA1 or SCRAM-SHA256 (Salted Challenge Response Authentication Mechanism - Secure Hash Algorithm 1 or 256) authentication by sending an excessively large iteration count value. This can lead to a computational denial-of-service attack, causing the client process to become unresponsive.
6.5 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
Vendor Fix
fix
Workaround
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Threats
Impact
Moderate
A flaw was found in Net::IMAP (before 0.4.24, 0.5.14, and 0.6.4). Several commands accept raw string arguments sent to the server without validation or escaping; if derived from user-controlled input, CRLF sequences allow injection of arbitrary IMAP commands.
6.1 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
Vendor Fix
fix
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Threats
Impact
Moderate
A flaw was found in Net::IMAP, a Ruby library that provides Internet Message Access Protocol (IMAP) client functionality. This vulnerability allows a remote attacker to inject arbitrary IMAP commands. This is possible when an IMAP server does not support non-synchronizing literals, leading to the misinterpretation of data as new commands. This command injection could enable unauthorized actions on the IMAP server.
6.1 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
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| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in Net::IMAP, a Ruby client library for the Internet Message Access Protocol (IMAP). This vulnerability allows a remote attacker to cause a denial of service by sending specially crafted input to certain Net::IMAP commands. When a raw string argument, derived from user-controlled input, is not properly validated, it can force subsequent commands to be absorbed, leading to a hung connection and preventing further processing until the connection is closed.
5.9 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in Net::IMAP, a Ruby library that implements Internet Message Access Protocol (IMAP) client functionality. This vulnerability arises from improper input validation when handling ID field values and arguments to the `enable` command. A remote attacker could exploit this by injecting specially crafted input, leading to the execution of arbitrary IMAP commands. This could allow an attacker to manipulate IMAP sessions or access sensitive information.
7.3 (High)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debuginfo-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-debugsource-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-devel-0:4.0.6-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-mysql2-debuginfo-0:0.5.7-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:ruby4.0-rubygem-pg-debuginfo-0:1.6.3-36.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-10.2.Z:ruby4.0-doc-0:4.0.6-36.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
46 references
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"text": "Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.\n\nSecurity Fix(es):\n\n* zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)\n\n* net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)\n\n* ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)\n\n* net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)\n\n* net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)\n\n* net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)\n\nBug Fix(es) and Enhancement(s):\n\n* ruby4.0: Rebase to the latest Ruby 4.0 release [rhel-10.2.z] (JIRA:RHEL-211310)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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"ids": [
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{
"category": "description",
"text": "A flaw was found in Net::IMAP, a Ruby library for Internet Message Access Protocol (IMAP) client functionality. A hostile server can exploit this vulnerability during SCRAM-SHA1 or SCRAM-SHA256 (Salted Challenge Response Authentication Mechanism - Secure Hash Algorithm 1 or 256) authentication by sending an excessively large iteration count value. This can lead to a computational denial-of-service attack, causing the client process to become unresponsive.",
"title": "Vulnerability description"
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{
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"text": "ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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{
"cve": "CVE-2026-42257",
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"ids": [
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{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Net::IMAP is vulnerable to IMAP command injection in versions before 0.4.24, 0.5.14, and 0.6.4. Several client commands accept raw string arguments that are sent to the IMAP server without CRLF validation or escaping; if application code passes user-controlled data into those arguments, an attacker can inject additional IMAP commands by embedding carriage return and line feed sequences. Red Hat impact is concentrated in Ruby-based products that bundle a vulnerable net-imap gem, including RHEL Ruby module streams, OpenShift Serverless (hummingbird) Ruby runtimes, and 3scale AMP components (zync/system) that use Net::IMAP with externally influenced input; Perl IMAP client packages on Fedora are a separate codebase and are not affected.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"title": "net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input"
},
{
"cve": "CVE-2026-47240",
"cwe": {
"id": "CWE-93",
"name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
},
"discovery_date": "2026-06-22T21:01:00.124981+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2491519"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Net::IMAP, a Ruby library that provides Internet Message Access Protocol (IMAP) client functionality. This vulnerability allows a remote attacker to inject arbitrary IMAP commands. This is possible when an IMAP server does not support non-synchronizing literals, leading to the misinterpretation of data as new commands. This command injection could enable unauthorized actions on the IMAP server.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net-imap: Net::IMAP: Command injection via non-synchronizing literals",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Moderate flaw in the Net::IMAP Ruby library allows for command injection against IMAP servers that lack support for non-synchronizing literals. An attacker could exploit this by providing specially crafted input, leading to the execution of arbitrary IMAP commands and potential unauthorized actions. This risk is primarily present in deployments interacting with older or non-standard IMAP server configurations.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-47240"
},
{
"category": "external",
"summary": "RHBZ#2491519",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491519"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-47240",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47240"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47240",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47240"
},
{
"category": "external",
"summary": "https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8",
"url": "https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8"
}
],
"release_date": "2026-06-22T20:17:15.376000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-05T11:42:38+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L",
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"title": "net-imap: Net::IMAP: Command injection via non-synchronizing literals"
},
{
"cve": "CVE-2026-47241",
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"id": "CWE-88",
"name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
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"text": "2491523"
}
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{
"category": "description",
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A Moderate denial of service flaw was found in the Net::IMAP Ruby client library. This issue occurs when a remote attacker sends specially crafted input to certain Net::IMAP commands, causing the client connection to hang indefinitely. This can prevent further processing of IMAP commands until the connection is manually closed, impacting the availability of services relying on the Net::IMAP client.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"category": "self",
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{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491523"
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{
"category": "external",
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47241",
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},
{
"category": "external",
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"release_date": "2026-06-22T20:11:04.329000+00:00",
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{
"category": "vendor_fix",
"date": "2026-08-05T11:42:38+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cve": "CVE-2026-47242",
"cwe": {
"id": "CWE-78",
"name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
},
"discovery_date": "2026-06-22T21:01:10.532327+00:00",
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{
"category": "description",
"text": "A flaw was found in Net::IMAP, a Ruby library that implements Internet Message Access Protocol (IMAP) client functionality. This vulnerability arises from improper input validation when handling ID field values and arguments to the `enable` command. A remote attacker could exploit this by injecting specially crafted input, leading to the execution of arbitrary IMAP commands. This could allow an attacker to manipulate IMAP sessions or access sensitive information.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in the Net::IMAP Ruby library, which could allow a remote attacker to inject arbitrary IMAP commands. This is due to improper input validation when handling ID field values and arguments to the `enable` command. Successful exploitation requires user interaction, but could lead to manipulation of IMAP sessions or access to sensitive data.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-47242"
},
{
"category": "external",
"summary": "RHBZ#2491522",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491522"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-47242",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47242"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47242",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47242"
},
{
"category": "external",
"summary": "https://github.com/ruby/net-imap/security/advisories/GHSA-46q3-7gv7-qmgg",
"url": "https://github.com/ruby/net-imap/security/advisories/GHSA-46q3-7gv7-qmgg"
}
],
"release_date": "2026-06-22T20:19:41.222000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-05T11:42:38+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
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"url": "https://access.redhat.com/errata/RHSA-2026:50773"
},
{
"category": "workaround",
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"attackVector": "NETWORK",
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"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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