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Ffmpeg CVE-2026-65703

| EUVDEUVD-2026-48370 HIGH
Out-of-bounds Write (CWE-787)
2026-07-23 VulnCheck GHSA-x3xw-4qcq-c6mr
8.5
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.5 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
SUSE
6.1 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jul 23, 2026 - 19:46 vuln.today
CVE Published
Jul 23, 2026 - 18:52 cve.org
HIGH 8.5

DescriptionCVE.org

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.

AnalysisAI

Heap out-of-bounds write in FFmpeg's TDSC video decoder (versions 2.7 through 8.1.2) lets a remote attacker corrupt heap memory and potentially achieve code execution when a victim opens or transcodes a crafted AVI file whose frame dimensions change across TDSF frames. The flaw carries a CVSS 4.0 base score of 8.5 with high confidentiality, integrity, and availability impact, and requires the target to process the malicious file (UI:P). No public exploit identified at time of analysis, and it is not listed in CISA KEV; it was reported by VulnCheck.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected

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CVE-2026-65703 vulnerability details – vuln.today

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