CVE-2026-65703 | FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds w… | CVSS 7.8 HIGH

Description

FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution.

Metadata

CVE ID: CVE-2026-65703
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-22 20:26 UTC
Published: 2026-07-23 18:52 UTC
Last updated: 2026-07-23 19:29 UTC
Primary CWE: CWE-787
Out-of-bounds Write
Vendor / Product: FFmpeg / FFmpeg
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
FFmpeg	FFmpeg	—	2.7 ≤ 8.1.2, fd3ee52fab34d98a95b787d0b5ff45685766200c

Weakness (CWE)

CWE	Source	Description
CWE-787	cna	Out-of-bounds Write

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.5	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (3)