High [CVE-2026-66040] Arbitrary code execution via crafted PNG image
This high-severity Red Hat Linux advisory covers CVE-2026-66040 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 b506faf, contains a heap out-of-bounds write vulnerability in the native PNG and APNG encoders that allows remote attackers to corrupt heap memory by supplying a crafted PNG image with a malicious eXIf chunk.
Attackers can craft an eXIf chunk where multiple IFD entries reference the same large value payload, causing canonical serialization to expand the output far beyond the undersized allocation estimated by add_exif_profile_size(), resulting in png_write_chunk() writing tens of thousands of bytes past the buffer boundary, leading to deterministic heap corruption, process crash, and potentially arbitrary code execution.
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 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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