CVE-2025-69420 Affecting openssl-libs package, versions <1:3.5.1-7.el9_7


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.07% (22nd percentile)

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  • Snyk IDSNYK-ROCKY9-OPENSSLLIBS-15159652
  • published31 Jan 2026
  • disclosed27 Jan 2026

Introduced: 27 Jan 2026

NewCVE-2025-69420  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 openssl-libs to version 1:3.5.1-7.el9_7 or higher.
This issue was patched in RLSA-2026:1473.

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:9 relevant fixed versions and status.

Issue summary: A type confusion vulnerability exists in the TimeStamp Response verification code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing a malformed TimeStamp Response file.

Impact summary: An application calling TS_RESP_verify_response() with a malformed TimeStamp Response can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service.

The functions ossl_ess_get_signing_cert() and ossl_ess_get_signing_cert_v2() access the signing cert attribute value without validating its type. When the type is not V_ASN1_SEQUENCE, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash.

Exploiting this vulnerability requires an attacker to provide a malformed TimeStamp Response to an application that verifies timestamp responses. The TimeStamp protocol (RFC 3161) is not widely used and the impact of the exploit is just a Denial of Service. 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 TimeStamp Response implementation is outside the OpenSSL FIPS module boundary.

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

OpenSSL 1.0.2 is not affected by this issue.

CVSS Base Scores

version 3.1