NULL pointer dereference in FFmpeg

Published: 2019-04-19 | Updated: 2019-04-19
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-11338
Exploitation vector Network
Public exploit N/A
Vulnerable software FFmpeg Subscribe

Security Advisory

This security advisory describes one medium risk vulnerability.

1) NULL pointer dereference

Severity: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-11338

CWE-ID: CWE-476 - NULL Pointer Dereference


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when detecting duplicate first slices within libavcodec/hevcdec.c file. A remote attacker can trigger denial of service conditions via crafted HEVC data.


Install update from vendor's repository.

Vulnerable software versions

FFmpeg: 4.1.2

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.