CVE-2026-18393

medium

Assigned by CNA: redhat

Published 2026-08-28 · Modified 2026-08-28

Discuss on Community Propose mitigation

CVSS v3

5.4

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

CVSS v4 NEW

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not yet in upstream

VIR risk

5.4

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.

Predictions

Exploit likelihood

54%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

References

CWEs

CWE-787

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.