Red HatCVE-2026-18393
Red Hat FFmpeg: denial of service
Medium5.4CVE-2026-18393 · Published Aug 28, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux AI (RHEL AI) 3 Product | all versions | No fix yet |
| Red Hat OpenShift AI (RHOAI) Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-787
- www.cve.org/CVERecord?id=CVE-2026-18393
- nvd.nist.gov/vuln/detail/CVE-2026-18393
- access.redhat.com/security/cve/CVE-2026-18393
- bugzilla.redhat.com/show_bug.cgi?id=2520309
- github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c
- patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 28 | Red Hat file-psd plugin: out-of-bounds read | Medium6.1 | No fix yet |
| Aug 28 | Red Hat libsolv: denial of service | Medium5.5 | No fix yet |
| Aug 28 | Red Hat file-ico plugin: out-of-bounds read | Medium6.1 | No fix yet |
| Aug 28 | Red Hat file-pvr plugin: out-of-bounds read | Medium6.1 | No fix yet |
| Aug 28 | Red Hat GIMP: denial of service | Medium6.1 | No fix yet |
| Aug 28 | Red Hat Ansible Automation Platform 2: resource exhaustion | Medium5.9 | No fix yet |