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Vulnerability record · CVE-2019-11338 · published 19 April 2019

CVE-2019-11338: Ffmpeg null pointer dereference vulnerability

Ffmpeg · Ffmpeg

libavcodec/hevcdec.c in FFmpeg 3.4 and 4.1.2 mishandles detection of duplicate first slices, which allows remote attackers to cause a denial of service (NULL pointer dereference and out-of-array access) or possibly have unspecified other impact via crafted HEVC data.

8.8 CVSS 3.1 High EPSS 2.4% · top 16.8% CWE-476 · NULL pointer dereference
8.8CVSS 3.1 base score, v2 6.8
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

libavcodec/hevcdec.c in FFmpeg 3.4 and 4.1.2 mishandles detection of duplicate first slices, which allows remote attackers to cause a denial of service (NULL pointer dereference and out-of-array access) or possibly have unspecified other impact via crafted HEVC data.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00012.html Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/108034 Broken Link
https://github.com/FFmpeg/FFmpeg/commit/54655623a82632e7624714d7b2a3e039dc5faa7e PatchThird Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/9ccc633068c6fe76989f487c8932bd11886ad65b PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00043.html Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2019/May/60 Mailing ListThird Party Advisory
https://usn.ubuntu.com/3967-1/ Third Party Advisory
https://usn.ubuntu.com/4431-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4449 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00012.html Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/108034 Broken Link
https://github.com/FFmpeg/FFmpeg/commit/54655623a82632e7624714d7b2a3e039dc5faa7e PatchThird Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/9ccc633068c6fe76989f487c8932bd11886ad65b PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00043.html Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2019/May/60 Mailing ListThird Party Advisory
https://usn.ubuntu.com/3967-1/ Third Party Advisory
https://usn.ubuntu.com/4431-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4449 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-11338), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.