TI-2026-49342 Aliases CVE-2026-70632 GHSA-q24x-99v6-6hxc

FFmpeg 4.4 < 9.0 Heap Out-of-Bounds Write in CFHD Decoder via AVI Demuxing

LOW 38CWE-787Published 2026-08-06 · Updated 2026-08-14

Key facts

Attack vector: Local
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

FFmpeg versions from 4.4 up to, but not including, 9.0 contain an out-of-bounds heap write vulnerability in the native GoPro CineForm HD (CFHD) decoder that allows remote attackers to corrupt heap memory by supplying a crafted AVI file during stream probing. The cfhd_decode() function fails to enforce the non-Bayer logical output-width invariant in the transform-type-2 reconstruction path, causing horiz_filter_clip() to write oversized 16-bit sample rows far beyond the allocated output frame buffer, which can be escalated to arbitrary code execution via overwrite of a live cleanup callback pointer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00228 13th percentileScored 2026-11-07

Fix Partial FFmpeg (FFmpeg): 9.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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	4.4 to before 9.0	9.0	Patch available	CNA

FFmpeg VendorFFmpeg Affected 4.4 to before 9.0 Fixed in 9.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ffmpeg:ffmpeg::::::::	4.4 to before 9	Vulnerable	FFmpeg

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* Versions 4.4 to before 9 Vulnerable ·FFmpeg

Remediation

Fix · CNA FFmpeg (FFmpeg) Fixed in 9.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-08-06
FFmpeg 9.0
5 records Highest priority Priority LOW 5 LOW
Other records, highest priority first
- TI-2026-49338 FFmpeg 0.5 < 9.0 DVB Subtitle Parser Heap Buffer Overflow via WTV FilePriority LOW 38
- TI-2026-49341 FFmpeg 0.5 < 9.0 Uninitialized Heap Memory Read in TIFF DecoderPriority LOW 29
- TI-2026-49340 FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso DecoderPriority LOW 29
Show all 5 records →

Vendor assessments

Red Hat

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

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

Timeline

2026-10-02 Threatist record created from CVE-2026-70632
2026-10-03 Alias added: GHSA-q24x-99v6-6hxc

References

Patch 4

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 514 →

Sources

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