Is CVE-2026-64831 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-64831?

CVE-2026-64831 has a CVSS v3 severity of HIGH (8.8).

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CVE-2026-64831

Description

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.