CVE-2026-18393

Ffmpeg: ffmpeg: heap buffer overflow in tdsc_load_cursor() via cur_fmt_mono cursor

Published: Aug 28, 2026Updated: Aug 28, 2026 Sources: CVE List NVDCWE-787

5.4MEDIUM

Description

A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond the bounds of a heap-allocated buffer when processing crafted TDSC cursor data. A remote attacker could exploit this by supplying a specially crafted video file, potentially leading to a denial of service or arbitrary code execution.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:AAttack Vector

Adjacent

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:HAvailability

High

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Weaknesses

CWE-787

Affected Products

Red Hat

commercial·US

Red Hat Enterprise Linux AI (RHEL AI) 3On-premOS

Operating Systems / linux-distro

Red Hat OpenShift AI (RHOAI)SaaSSaaS Service

Cloud & SaaS

Exploitability

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

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References

https://access.redhat.com/security/cve/CVE-2026-18393

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2520309

bugzilla.redhat.com

https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c

github.com

and 1 more references View all →

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