Out-of-bounds Write Affecting ffmpeg package, versions <7:4.4.2-0ubuntu0.22.04.1+esm16


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.29% (21st percentile)

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  • Snyk IDSNYK-UBUNTU2204-FFMPEG-17684768
  • published14 Sept 2026
  • disclosed28 Jun 2026

Introduced: 28 Jun 2026

CVE-2026-58049  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 ffmpeg to version 7:4.4.2-0ubuntu0.22.04.1+esm16 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg package and not the ffmpeg package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1