RHSA-2026:58563
Vulnerability from csaf_redhat - Published: 2026-08-24 03:05 - Updated: 2026-08-26 22:04Summary
Red Hat Security Advisory: openssl security update
Severity
Important
Notes
Topic: An update for openssl is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
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: OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.
Security Fix(es):
* openssl: SSL_select_next_proto buffer overread (CVE-2024-5535)
* openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing (CVE-2026-28390)
* openssl: Heap Use-After-Free in OpenSSL PKCS7_verify() (CVE-2026-45447)
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 OpenSSL. Affected versions of this package are vulnerable to Information Exposure through the SSL_select_next_proto function. This flaw allows an attacker to cause unexpected application behavior or a crash by exploiting the buffer overread condition when the function is called with a zero-length client list. This issue is only exploitable if the application is misconfigured to use a zero-length server list and mishandles the 'no overlap' response in ALPN or uses the output as the opportunistic protocol in NPN.
5.9 (Medium)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64le | — |
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fix
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.src | — |
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fix
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.x86_64 | — |
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fix
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64 | — |
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fix
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.x86_64 | — |
Vendor Fix
fix
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Known not affected
14 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
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Threats
Impact
Low
A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax (CMS) EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter field without first verifying its presence. This leads to a NULL pointer dereference, which can cause applications processing the attacker-controlled CMS data to crash, resulting in a Denial of Service (DoS).
7.5 (High)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.src | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.i686 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc | — |
Vendor Fix
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc | — |
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fix
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390 | — |
Vendor Fix
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Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
Known not affected
14 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
|
|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
Workaround
|
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
Workaround
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
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Threats
Impact
Moderate
A flaw was found in OpenSSL. When processing a specially crafted PKCS#7 or S/MIME (Secure/Multipurpose Internet Mail Extensions) signed message, a heap use-after-free vulnerability in the PKCS7_verify() function can be triggered. This occurs if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, leading to incorrect memory deallocation. A remote attacker could exploit this to cause application crashes, memory corruption, or potentially achieve remote code execution.
8.1 (High)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.s390x | — |
Vendor Fix
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Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.src | — |
Vendor Fix
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Workaround
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| Unresolved product id: 7Server-ELS:openssl-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-devel-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.i686 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc | — |
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Workaround
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390 | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-ELS:openssl-libs-1:1.0.2k-26.el7_9.2.x86_64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64 | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.ppc64le | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.s390x | — |
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| Unresolved product id: 7Server-optional-ELS:openssl-perl-1:1.0.2k-26.el7_9.2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.i686 | — |
Vendor Fix
fix
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc | — |
Vendor Fix
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Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.s390x | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: 7Server-optional-ELS:openssl-static-1:1.0.2k-26.el7_9.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
Known not affected
14 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
|
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
|
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
Workaround
|
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
|
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| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
|
|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
Workaround
|
|
| Unresolved product id: 7Server-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.i686 | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64 | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.ppc64le | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390 | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.s390x | — |
Workaround
|
|
| Unresolved product id: 7Server-optional-ELS:openssl-debuginfo-1:1.0.2k-26.el7_9.2.x86_64 | — |
Workaround
|
Threats
Impact
Important
References
25 references
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2294581"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in OpenSSL. Affected versions of this package are vulnerable to Information Exposure through the SSL_select_next_proto function. This flaw allows an attacker to cause unexpected application behavior or a crash by exploiting the buffer overread condition when the function is called with a zero-length client list. This issue is only exploitable if the application is misconfigured to use a zero-length server list and mishandles the \u0027no overlap\u0027 response in ALPN or uses the output as the opportunistic protocol in NPN.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "openssl: SSL_select_next_proto buffer overread",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The FIPS modules in versions 3.3, 3.2, 3.1, and 3.0 are not affected by this issue.\nThe packages shim and shim-unsigned-x64 are not impacted by this CVE, as the affected OpenSSL code path is not utilized.",
"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": "external",
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{
"category": "external",
"summary": "https://www.oracle.com/security-alerts/cpuoct2024.html#AppendixMSQL",
"url": "https://www.oracle.com/security-alerts/cpuoct2024.html#AppendixMSQL"
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"date": "2026-08-24T03:05:12+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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"attackVector": "NETWORK",
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"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"title": "openssl: SSL_select_next_proto buffer overread"
},
{
"cve": "CVE-2026-28390",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456314"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in OpenSSL. A remote attacker could exploit this vulnerability by sending a specially crafted Cryptographic Message Syntax (CMS) EnvelopedData message. During the processing of a KeyTransportRecipientInfo with RSA-OAEP encryption, the system attempts to access an optional parameter field without first verifying its presence. This leads to a NULL pointer dereference, which can cause applications processing the attacker-controlled CMS data to crash, resulting in a Denial of Service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This CVE has been rated as moderate by redhat because the vulnerability is limited to a denial-of-service condition caused by a NULL pointer dereference in OpenSSL CMS processing, without evidence of memory corruption or code execution, furthermore the Affected functionality is niche. The vulnerable path requires:\nCMS/S/MIME processing,\nspecifically CMS_decrypt(),\nwith RSA-OAEP KeyTransportRecipientInfo.\nMany OpenSSL consumers never use CMS APIs, never process S/MIME,\nor do not decrypt attacker-controlled CMS objects.\nSo exposure is far narrower than a generic TLS parsing vulnerability.",
"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-2026-28390"
},
{
"category": "external",
"summary": "RHBZ#2456314",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456314"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-28390",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-28390"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-28390",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28390"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc",
"url": "https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6",
"url": "https://github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4",
"url": "https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788",
"url": "https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75",
"url": "https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75"
},
{
"category": "external",
"summary": "https://openssl-library.org/news/secadv/20260407.txt",
"url": "https://openssl-library.org/news/secadv/20260407.txt"
}
],
"release_date": "2026-04-07T22:00:54.172000+00:00",
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{
"category": "vendor_fix",
"date": "2026-08-24T03:05:12+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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},
{
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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"title": "openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing"
},
{
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2481898"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in OpenSSL. When processing a specially crafted PKCS#7 or S/MIME (Secure/Multipurpose Internet Mail Extensions) signed message, a heap use-after-free vulnerability in the PKCS7_verify() function can be triggered. This occurs if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, leading to incorrect memory deallocation. A remote attacker could exploit this to cause application crashes, memory corruption, or potentially achieve remote code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "openssl: Heap Use-After-Free in OpenSSL PKCS7_verify()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This High severity heap use-after-free flaw in OpenSSL\u0027s PKCS7_verify() function can be triggered by processing a specially crafted PKCS#7 or S/MIME signed message. This could lead to application crashes, memory corruption, or potentially remote code execution, impacting services that handle such messages. The vulnerability specifically affects applications utilizing OpenSSL PKCS#7 APIs, while those using CMS APIs are not impacted.",
"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": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481898"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45447",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45447"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45447",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45447"
}
],
"release_date": "2026-06-09T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2026-08-24T03:05:12+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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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "openssl: Heap Use-After-Free in OpenSSL PKCS7_verify()"
}
]
}
Loading…
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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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