Medium [CVE-2026-66037] Denial of Service via uncontrolled resource consumption in IAMF demuxer
This medium-severity Red Hat Linux advisory covers CVE-2026-66037 affecting Red Hat OpenShift AI 3.3, Red Hat Enterprise Linux AI (RHEL AI) 3.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted count_label field.
The mix_presentation_obu() function in libavformat/iamf_parse.c calls av_calloc(count_label, sizeof(*language_label)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.
A flaw was found in FFmpeg. This can cause the system to allocate a large amount of memory, leading to resource exhaustion and a denial of service.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-770.
Affected Red Hat products: Red Hat OpenShift AI 3.3; Red Hat Enterprise Linux AI (RHEL AI) 3. Red Hat fixing advisory: RHSA-2026:73987.
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 1 month ago·verify at source
- 8.1.2
- rhoai/odh-vllm-gaudi-rhel9:1789121263
- RHSA-2026:73987
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation
Upgrade to a fixed release: 8.1.2, rhoai/odh-vllm-gaudi-rhel9:1789121263, RHSA-2026:73987. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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