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  4. CVE 2026 12706 ffmpeg ffmpeg heap use after free read in rasc
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-12706

Ffmpeg: ffmpeg: heap use-after-free read in rasc decoder decode_move()CVE-2026-12706

Answer in brief

CVE-2026-12706 records a Medium severity (CVSS 6.5) vulnerability in Ffmpeg: ffmpeg: heap use-after-free read in rasc decoder decode_move(). The current sources do not mark it as known exploited. The current feed maps Red Hat/ffmpeg (generic), Red Hat/rhelai3/bootc-aws-cuda-rhel9 (generic), Red Hat/rhelai3/bootc-azure-cuda-rhel9 (generic), Red Hat/rhelai3/bootc-azure-rocm-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 19, 2026Updated Jun 22, 2026Source checked Nov 4, 2026First seen by HOL Jun 19, 2026Material review Jun 22, 2026
Upstream Advisory

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 4, 2026
References
4 linked sources
Open source record

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
8 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/ffmpeg (generic), Red Hat/rhelai3/bootc-aws-cuda-rhel9 (generic), Red Hat/rhelai3/bootc-azure-cuda-rhel9 (generic), Red Hat/rhelai3/bootc-azure-rocm-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/ffmpeggeneric*Not reported
Red Hat/rhelai3/bootc-aws-cuda-rhel9generic*Not reported
Red Hat/rhelai3/bootc-azure-cuda-rhel9generic*Not reported
Red Hat/rhelai3/bootc-azure-rocm-rhel9generic*Not reported
Red Hat/rhelai3/bootc-cuda-rhel9generic*Not reported
Red Hat/rhelai3/bootc-gcp-cuda-rhel9generic*Not reported
Red Hat/rhelai3/bootc-rocm-rhel9generic*Not reported
Red Hat/rhoai/odh-vllm-gaudi-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/ffmpeg, Red Hat/rhelai3/bootc-aws-cuda-rhel9, Red Hat/rhelai3/bootc-azure-cuda-rhel9.
  2. 2Review the reported fix. Source-reported workaround: If the RASC decoder is not needed, it can be disabled at build time with --disable-decoder=rasc. There is no runtime workaround that disables the decoder without rebuilding FFmpeg.

Evidence timeline and material changes

  1. Published upstream

    Jun 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Jun 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 19, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • Source referencelists.ffmpeg.org
  • Source referencepatchwork.ffmpeg.org
Upstream source description

A use-after-free vulnerability was found in FFmpeg's RASC video decoder. The decode_move() function initializes a read pointer into a decompressed buffer, but a subsequent reallocation of that same buffer during move-table processing leaves the pointer dangling. An attacker could exploit this by providing a specially crafted AVI file containing a malicious RASC video stream. When a user opens or plays the file, the decoder reads from freed heap memory, which could lead to a denial of service (crash).

Quoted source text, attributed separately from HOL analysis.