Description
FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in bitpacked_decode_uyvy422() in libavcodec/bitpacked_dec.c because it never verifies packets hold width * height * 2 bytes. Attackers can supply truncated bitpacked UYVY422 packets via crafted SDP/RFC 4175 RTP sessions or raw input to crash applications or expose adjacent heap memory.
Published: 2026-11-09
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: Out-of-Bounds Read leading to crash or memory disclosure
Action: Apply Patch
AI Analysis

Impact

FFmpeg up to and including version 9.0.2 contains an out‑of‑bounds read in the function bitpacked_decode_uyvy422() because the decoder never verifies that input packets contain width × height × 2 bytes before reading. The resulting overread can crash the application or leak adjacent heap data, constituting a classic buffer overread flaw catalogued as CWE‑125.

Affected Systems

The flaw affects FFmpeg deployments that rely on the default bitpacked UYVY422 decoder up to firmware version 9.0.2.

Risk and Exploitability

The CVSS score of 6.9 indicates moderate severity, and the vulnerability is not listed in CISA's KEV catalog. While the EPSS score is not available, the reported attack paths involve supplying truncated bitpacked UYVY422 packets through crafted SDP/RFC 4175 RTP sessions or raw file input. An attacker who can deliver such packets to a decoding host can trigger a crash or read sensitive memory, but the exploit requires manipulating the media stream rather than arbitrary code execution on the host.

Generated by OpenCVE AI on November 9, 2026 at 22:43 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update FFmpeg to the latest released version that includes the upstream fix for the out‑of‑bounds read in bitpacked_decode_uyvy422().
  • Validate incoming media packets in your application to ensure packet length equals width × height × 2 bytes before invoking the decoder, preventing inadvertent overread.
  • Block or isolate RTP streams that contain malformed or truncated bitpacked UYVY422 packets through firewall or media server policies, reducing the chance of an exploit.

Generated by OpenCVE AI on November 9, 2026 at 22:43 UTC.

Tracking

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Advisories

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History

Mon, 09 Nov 2026 19:15:00 +0000

Type Values Removed Values Added
Description FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in bitpacked_decode_uyvy422() in libavcodec/bitpacked_dec.c because it never verifies packets hold width * height * 2 bytes. Attackers can supply truncated bitpacked UYVY422 packets via crafted SDP/RFC 4175 RTP sessions or raw input to crash applications or expose adjacent heap memory.
Title FFmpeg through 9.0.2 Out-of-Bounds Read via bitpacked_decode_uyvy422()
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-125
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Ffmpeg Ffmpeg
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T19:11:15.182Z

Reserved: 2026-11-09T18:15:09.654Z

Link: CVE-2026-125193

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-09T19:16:55.217

Modified: 2026-11-09T19:16:55.217

Link: CVE-2026-125193

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-09T23:00:10Z

Weaknesses