CVE-2026-22796 Affecting openssl-libs package, versions <1:3.5.1-7.el10_1


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.09% (26th percentile)

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  • Snyk IDSNYK-ROCKY10-OPENSSLLIBS-15159993
  • published31 Jan 2026
  • disclosed27 Jan 2026

Introduced: 27 Jan 2026

NewCVE-2026-22796  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 openssl-libs to version 1:3.5.1-7.el10_1 or higher.
This issue was patched in RLSA-2026:1472.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS#7 data where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing malformed PKCS#7 data.

Impact summary: An application performing signature verification of PKCS#7 data or calling directly the PKCS7_digest_from_attributes() function can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service.

The function PKCS7_digest_from_attributes() accesses the message digest attribute value without validating its type. When the type is not V_ASN1_OCTET_STRING, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash.

Exploiting this vulnerability requires an attacker to provide a malformed signed PKCS#7 to an application that verifies it. The impact of the exploit is just a Denial of Service, the PKCS7 API is legacy and applications should be using the CMS API instead. For these reasons the issue was assessed as Low severity.

The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module boundary.

OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

CVSS Base Scores

version 3.1