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OpenAdvisories
Medium · 5.4 CVE-2026-18393 EUVD-2026-67655GHSA-2g8r-jjgv-h39x

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

Published Aug 28, 2026 · Updated Aug 28, 2026 · Assigned by redhat

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.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 — —
Red Hat Red Hat OpenShift AI (RHOAI) — —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 ffmpeg 7:8.1.1-1 —
Debian 13 ffmpeg No fix yet —
Debian 12 ffmpeg No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 ffmpeg No fix yet —
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 26.04 LTS ffmpeg No fix yet —
Ubuntu Pro 24.04 LTS ffmpeg No fix yet —
Ubuntu Pro 22.04 LTS ffmpeg No fix yet —
Ubuntu Pro 20.04 LTS ffmpeg No fix yet —
Ubuntu Pro 18.04 LTS ffmpeg No fix yet —
Ubuntu Pro 16.04 LTS ffmpeg No fix yet —
Ubuntu Pro 14.04 LTS libav No fix yet —
ReleasePackageFixed inAdvisory
SLES 15 SP7 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLES 15 SP6 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLES 15 SP5 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLES 15 SP4 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
Show 5 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP6 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLES for SAP 15 SP5 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLES for SAP 15 SP4 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLE HPC 15 SP5 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
SLE HPC 15 SP4 ffmpeg 3.4.2-150200.11.88.1 SUSE-SU-2026:5220-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed ffmpeg-4 4.4.8-6.1 openSUSE-SU-2026:12064-1
openSUSE Tumbleweed ffmpeg-7 7.1.5-4.1 openSUSE-SU-2026:12108-1
openSUSE Tumbleweed ffmpeg-8 8.1.2-5.1 openSUSE-SU-2026:11794-1
openSUSE Tumbleweed ffmpeg-9 9.0.1-6.1 openSUSE-SU-2026:11795-1

Advisories 6

References