High [CVE-2026-64831] Arbitrary code execution via crafted HEVC/H.265 bitstream
This high-severity Red Hat Linux advisory covers CVE-2026-64831.
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Summary
FFmpeg versions 8.0 through 8.1.2 contains a stack buffer overflow vulnerability in the Vulkan HEVC hardware decoder that allows remote attackers to overwrite return addresses and adjacent stack frames by supplying a crafted HEVC/H.265 bitstream.
Attackers can embed a malicious vps_num_hrd_parameters value exceeding HEVC_MAX_SUB_LAYERS in any supported container format to overflow stack-allocated arrays in the vk_hevc_end_frame function, potentially achieving arbitrary code execution. A flaw was found in FFmpeg.
A remote attacker can exploit a stack buffer overflow vulnerability in the Vulkan HEVC (High Efficiency Video Coding) hardware decoder by providing a specially crafted HEVC/H.265 bitstream. This can lead to overwriting memory on the stack, potentially allowing the 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-120.
Red Hat lists Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI) as not affected.
- 8.1.2
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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