PT-2026-53081 · Undefined · Undefined

Published 2026-06-28 · Updated 2026-06-28 · CVE-2026-58049

NVD

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

FFmpeg's RASC video decoder (decode dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL8 frame can access several bytes past the row allocation. A crafted media stream using the RASC FourCC, decoded by libavcodec, triggers a bitstream-controlled out-of-bounds heap write and adjacent out-of-bounds read, leading to memory corruption.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-58049

Affected Products

Undefined

References · 4

• 🔥 https://github.com/bikini/exploitarium/tree/main/ffmpeg-rasc-dlta-calc-poc · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-58049 · Security Note
• https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/rasc.c · Note
• https://vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-rasc-decoder-decode-dlta · Note