High [CVE-2026-66039] Arbitrary code execution via crafted CAF file
This high-severity Red Hat Linux advisory covers CVE-2026-66039 affecting Red Hat Enterprise Linux AI 3.3 for RHEL 9, Red Hat Enterprise Linux AI 3.4 for RHEL 9, Red Hat Enterprise Linux AI 3.5 for RHEL 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
FFmpeg through 8.1.2, fixed in commit aafb5c6, contains a signed integer overflow vulnerability in the MACE6 audio decoder that allows attackers to corrupt heap memory by supplying a crafted CAF file with a malicious bytes_per_packet value.
Attackers can craft a CAF file with oversized bytes_per_packet and frames_per_packet values in the desc chunk to trigger an integer overflow in mace_decode_frame() during output sample count computation, resulting in an undersized buffer allocation and heap out-of-bounds write that could enable code execution. A flaw was found in FFmpeg.
This vulnerability could allow an attacker to execute arbitrary code on the affected system. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux AI 3.3 for RHEL 9; Red Hat Enterprise Linux AI 3.4 for RHEL 9; Red Hat Enterprise Linux AI 3.5 for RHEL 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI).
Red Hat fixing advisory: RHSA-2026:60336, RHSA-2026:60334, RHSA-2026:60335.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
- 8.1.2
- ffmpeg-0:6.1.6-7.el9ai
- RHSA-2026:60336
- RHSA-2026:60334
- RHSA-2026:60335
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation
Upgrade to a fixed release: 8.1.2, ffmpeg-0:6.1.6-7.el9ai, RHSA-2026:60336, RHSA-2026:60334, RHSA-2026:60335. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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