VULNERABILITY INTELLIGENCE

CVE-2026-58049

CVSS score8.6 HIGH
EPSS probability0.50%
CISA KEVNot currently listed
Published2026-06-28
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Description

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-787
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-787

Primary references