TI-2026-83570 Aliases CVE-2026-120245 GHSA-c346-mwjq-88hv

Uninitialized memory disclosure in FFmpeg Sun Raster decoder

LOW 29CWE-908Published 2026-11-01 · Updated 2026-11-02

Key facts

Attack vector: Local
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-908 and the CVSS impact.

Summary

FFmpeg 0.10 through 9.0.2 is affected. A use of uninitialized resource (CWE-908) in sunrast_decode_frame() leaks heap memory when decoding truncated 1-bit and 4-bit paletted Sun Raster images. A local attacker with no privileges can craft a truncated Sun Raster file that exposes stale heap contents, such as allocator words, in decoded output if a user opens it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

FFmpeg 0.10 through 9.0.2 contains a use of uninitialized resource vulnerability in sunrast_decode_frame() that leaks heap memory when decoding truncated 1-bit and 4-bit paletted Sun Raster images. Attackers can craft a truncated Sun Raster file so the uncleared temporary bitmap is expanded into PAL8 pixels, exposing stale heap contents such as allocator words in decoded output.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00124 2nd percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
FFmpeg	FFmpeg	0.10 – 9.0.2	—	No fix listed	CNA

FFmpeg VendorFFmpeg Affected 0.10 – 9.0.2 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:ffmpeg:ffmpeg::::::::	—	—	FFmpeg

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* Versions — — ·FFmpeg

Remediation

The sources list no fixed version for FFmpeg. Red Hat lists Red Hat Enterprise Linux AI (RHEL AI) 3 and Red Hat OpenShift AI (RHOAI) as affected, with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Timeline

2026-11-01 Threatist record created from CVE-2026-120245
2026-11-01 Alias added: GHSA-c346-mwjq-88hv
2026-11-01 Affected versions changed · Red Hat
2026-11-01 CVSS score added · Red Hat
2026-11-02 Priority changed: MEDIUM → LOW
2026-11-02 CISA SSVC decision points changed

References

Patch 2

Other 3

TI-2025-19015 FFmpeg git-master before commit d5873b was discovered to contain a memory leak in the component libavutil/iamf.c. CVSS 3.1HIGH 8.8
TI-2024-21238 FFmpeg 7.0 contains a heap-buffer-overflow at libavfilter/vf_tiltandshift.c:189:5 in copy_column. CVSS 3.1HIGH 8.4
TI-2023-06050 Ffmpeg: null pointer dereference in ffmpeg hls parsing CVSS 3.1HIGH 7.5
TI-2023-28420 Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local attacker to… CVSS 3.1HIGH 8.0
TI-2023-27357 FFmpeg v.n6.1-3-g466799d4f5 allows a heap-based buffer overflow via the… CVSS 3.1HIGH 8.0
TI-2023-27044 Buffer Overflow vulnerability in FFmpeg version n6.1-3-g466799d4f5, allows a local… CVSS 3.1HIGH 8.0

See all 538 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences