RHSA-2026:84573
Vulnerability from csaf_redhat - Published: 2026-10-19 05:56 - Updated: 2026-10-29 06:07Summary
Red Hat Security Advisory: openssl security update
Severity
Important
Notes
Topic: An update for openssl is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.
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: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418)
* openssl: openssl: Information Disclosure from Uninitialized Memory via Invalid RSA Public Key (CVE-2026-31790)
* openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing (CVE-2026-28390)
* openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages (CVE-2026-34182)
* openssl: AES-OCB IV Ignored on EVP_Cipher() Path (CVE-2026-45445)
* 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. When applications directly call the low-level CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions with non-block-aligned lengths in a single call on hardware-accelerated builds, the trailing 1-15 bytes of a message may be exposed in cleartext. These exposed bytes are not covered by the authentication tag, allowing an attacker to read or tamper with them without detection.
4.0 (Medium)
Affected products
Fixed
40 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-1:3.0.7-29.el9_4.3.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debuginfo-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-debugsource-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-9.4.0.Z.E4S:openssl-libs-debuginfo-1:3.0.7-29.el9_4.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
Known not affected
9 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-devel-1:3.0.7-29.el9_4.3.aarch64 | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-devel-1:3.0.7-29.el9_4.3.i686 | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-devel-1:3.0.7-29.el9_4.3.ppc64le | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-devel-1:3.0.7-29.el9_4.3.s390x | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-devel-1:3.0.7-29.el9_4.3.x86_64 | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-perl-1:3.0.7-29.el9_4.3.aarch64 | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-perl-1:3.0.7-29.el9_4.3.ppc64le | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-perl-1:3.0.7-29.el9_4.3.s390x | — |
Workaround
|
|
| Unresolved product id: AppStream-9.4.0.Z.E4S:openssl-perl-1:3.0.7-29.el9_4.3.x86_64 | — |
Workaround
|
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
40 products, the same list as for
CVE-2025-69418
Known not affected
9 products, the same list as for
CVE-2025-69418
Threats
Impact
Moderate
A flaw was found in openssl. Applications that use RSASVE key encapsulation, a method for securely exchanging encryption keys, may inadvertently expose sensitive data. This vulnerability arises when an application processes a malicious, invalid RSA public key provided by an attacker without proper validation. Consequently, the application might send the contents of an uninitialized memory buffer, which could contain confidential information, to the attacker.
5.9 (Medium)
Affected products
Fixed
40 products, the same list as for
CVE-2025-69418
Known not affected
9 products, the same list as for
CVE-2025-69418
Threats
Impact
Moderate
A flaw was found in OpenSSL's Cryptographic Message Services (CMS) AuthEnvelopedData processing. An on-path attacker can exploit insufficient input validation on cipher and tag length fields by sending specially crafted CMS messages. This can lead to the forging of messages or bypassing integrity validation. Consequently, an attacker may achieve key-equivalent functionality for a given CMS recipient.
7.4 (High)
Affected products
Fixed
40 products, the same list as for
CVE-2025-69418
Known not affected
9 products, the same list as for
CVE-2025-69418
Threats
Impact
Moderate
A flaw was found in OpenSSL. Applications that use the AES-OCB encryption method with a specific one-shot interface (EVP_Cipher()) will have their provided Initialization Vector (IV) silently discarded. This leads to the same internal cryptographic value being used repeatedly, which compromises the confidentiality of encrypted data. Additionally, this issue allows for the universal forgery of authentication tags, undermining the integrity of communications.
9.1 (Critical)
Affected products
Fixed
40 products, the same list as for
CVE-2025-69418
Known not affected
9 products, the same list as for
CVE-2025-69418
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
40 products, the same list as for
CVE-2025-69418
Known not affected
9 products, the same list as for
CVE-2025-69418
Threats
Impact
Important
References
39 references
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"text": "A flaw was found in OpenSSL. When applications directly call the low-level CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions with non-block-aligned lengths in a single call on hardware-accelerated builds, the trailing 1-15 bytes of a message may be exposed in cleartext. These exposed bytes are not covered by the authentication tag, allowing an attacker to read or tamper with them without detection.",
"title": "Vulnerability description"
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"text": "openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "This vulnerability is rated Low for Red Hat products. In the Red Hat context, impact is limited because typical OpenSSL consumers using higher-level EVP APIs are not affected. The flaw only manifests when applications directly call low-level CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions with non-block-aligned lengths in hardware-accelerated builds. Additionally, TLS does not use OCB ciphersuites, and FIPS modules 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.",
"title": "CVSS score applicability"
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-69418"
},
{
"category": "external",
"summary": "RHBZ#2430381",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2430381"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-69418",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-69418"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-69418",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-69418"
}
],
"release_date": "2026-01-27T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-19T05:56:51+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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"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 4.0,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
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{
"cve": "CVE-2026-28390",
"cwe": {
"id": "CWE-476",
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{
"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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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28390"
},
{
"category": "external",
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{
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"date": "2026-10-19T05:56:51+00:00",
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{
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"title": "Vulnerability summary"
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"text": "Moderate impact. This flaw affects applications utilizing RSASVE key encapsulation, where an attacker-supplied invalid RSA public key is used with EVP_PKEY_encapsulate() without prior validation. This can lead to the disclosure of sensitive, uninitialized memory buffer contents to a malicious peer.",
"title": "Statement"
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{
"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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{
"category": "external",
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{
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
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{
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"name": "Improper Handling of Length Parameter Inconsistency"
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"text": "A flaw was found in OpenSSL\u0027s Cryptographic Message Services (CMS) AuthEnvelopedData processing. An on-path attacker can exploit insufficient input validation on cipher and tag length fields by sending specially crafted CMS messages. This can lead to the forging of messages or bypassing integrity validation. Consequently, an attacker may achieve key-equivalent functionality for a given CMS recipient.",
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{
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"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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{
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},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-34182"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-34182",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34182"
}
],
"release_date": "2026-06-09T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-19T05:56:51+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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"title": "openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages"
},
{
"cve": "CVE-2026-45445",
"cwe": {
"id": "CWE-1204",
"name": "Generation of Weak Initialization Vector (IV)"
},
"discovery_date": "2026-05-27T14:17:46+00:00",
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2481896"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in OpenSSL. Applications that use the AES-OCB encryption method with a specific one-shot interface (EVP_Cipher()) will have their provided Initialization Vector (IV) silently discarded. This leads to the same internal cryptographic value being used repeatedly, which compromises the confidentiality of encrypted data. Additionally, this issue allows for the universal forgery of authentication tags, undermining the integrity of communications.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "openssl: AES-OCB IV Ignored on EVP_Cipher() Path",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is a Moderate severity flaw where applications utilizing the AES-OCB cipher through OpenSSL\u0027s EVP_Cipher() one-shot interface may silently discard the provided initialization vector (IV). This leads to nonce reuse, compromising confidentiality and enabling universal forgery of authentication tags. Red Hat products are primarily affected if they include or rely on third-party applications that specifically employ this less common and discouraged API usage with AES-OCB, as standard OpenSSL SSL/TLS implementations and applications using the recommended streaming AEAD API 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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45445"
},
{
"category": "external",
"summary": "RHBZ#2481896",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481896"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45445",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45445"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45445",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45445"
}
],
"release_date": "2026-06-09T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-19T05:56:51+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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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
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{
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"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.",
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{
"category": "external",
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}
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"date": "2026-10-19T05:56:51+00:00",
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{
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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()"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.