🛡️ CVE-2026-12892 — enterprise-linux

🟡 CVSS 4.4 — Medium ✅ No Known Exploit CWE-125 NVD
4.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into opening a malicious H.264 video file, potentially causing the application to crash or leak a single byte of heap memory.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability low.

Weakness class

CVE-2026-12892 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-12892 is recorded against 2 packages.

  • enterprise-linux
  • gstreamer

Timeline and source

Published on 23 June 2026 and last revised on 6 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

access.redhat.com
bugzilla.redhat.com
gitlab.freedesktop.org

Details

Severity MEDIUM
CVSS Score 4.4
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2026-06-23
Updated 2026-08-11
Modified 2026-07-06
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-linux — —
gstreamer — —

Similar Threats

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