CVE-2026-18393
Ffmpeg: ffmpeg: heap buffer overflow in tdsc_load_cursor() via cur_fmt_mono cursor
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | red hat |
| Product | red hat enterprise linux ai (rhel ai) 3 |
| Published | Aug 28, 2026 |
| Last Updated | Aug 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux AI (RHEL AI) 3
All versions affected Red Hat / Red Hat OpenShift AI (RHOAI)
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-18393 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2520309 github.com: https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c patchwork.ffmpeg.org: https://patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/
Credits
Red Hat would like to thank Seung Min Shin (Ajou University) for reporting this issue.