CVE-2026-58049

EUVD-2026-39969

28.06.2026, 02:16

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.6 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 19.75%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
Red Hat	Red Hat Enterprise Linux AI 3.0 for RHEL 9	0:6.1.6-3.el9ai ≤ 𝑥 < *	ADP
Red Hat	Red Hat Enterprise Linux AI 3.2 for RHEL 9	0:6.1.6-3.el9ai ≤ 𝑥 < *	ADP
Red Hat	Red Hat Enterprise Linux AI 3.3 for RHEL 9	0:6.1.6-3.el9ai ≤ 𝑥 < *	ADP
Red Hat	Red Hat Enterprise Linux AI 3.5 for RHEL 9	0:6.1.6-1.el9ai ≤ 𝑥 < *	ADP

Debian Releases

Debian Product

Codename

ffmpeg

bookworm	vulnerable
bookworm (security)	vulnerable
bullseye	vulnerable
bullseye (security)	vulnerable
forky	vulnerable
sid	vulnerable
trixie	postponed
trixie (security)	vulnerable