CVE-2026-75145
MEDIUM
5,8
Source: [email protected]
Attack Vector: local
Attack Complexity: high
Privileges Required: none
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM
5,8
Source: [email protected]
Attack Vector: local
Attack Complexity: high
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: high
Description
AI Translation Available
FFmpeg before commit b4c199c contains an incorrect integer narrowing conversion in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The OBU size is cast to long before comparison against the remaining frame size. On targets where long is 32 bits, including 64-bit Windows, sufficiently large OBU size values are sign-flipped by the narrowing cast, producing a negative value that passes the payload size check. This allows an oversized OBU to bypass the safety bound on affected platforms, leading to out-of-bounds memory access when the oversized value is subsequently used as a copy length.
681
Incorrect Conversion between Numeric Types
DraftCommon Consequences
Security Scopes Affected:
Other
Integrity
Potential Impacts:
Unexpected State
Quality Degradation
Applicable Platforms
Languages:
C, Not Language-Specific
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b4c199c5906ff53368926c2a5839881f41…
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24090
https://www.vulncheck.com/advisories/ffmpeg-integer-narrowing-conversion-oob-me…