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CVE-2022-48434

Publication date 29 March 2023

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.1 · High

Score breakdown

libavcodec/pthread_frame.c in FFmpeg before 5.1.2, as used in VLC and other products, leaves stale hwaccel state in worker threads, which allows attackers to trigger a use-after-free and execute arbitrary code in some circumstances (e.g., hardware re-initialization upon a mid-video SPS change when Direct3D11 is used).

Read the notes from the security team

Status

Package Ubuntu Release Status
ffmpeg 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic Ignored end of life, was needed
22.04 LTS jammy
20.04 LTS focal
18.04 LTS bionic
16.04 LTS xenial Ignored see notes
14.04 LTS trusty Ignored end of standard support

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Notes

ccdm94

As of 2023-04-26 there is no public reproducer available for this issue, so there is no way to confirm through vulnerability testing that Xenial and Bionic are vulnerable to this issue. Xenial's version of FFmpeg is 2.8. Upstream has only provided patches for versions 4.4.x, 5.0.x and 5.1.x. Considering that the code for pthread_frame.c (file altered by the patch) and for FFmpeg has changed significantly from version 2.8 to version 4.4.3, applying the 4.4.3 patch is very likely to introduce security issues and regressions. Because of the very intrusive nature of the backport, Xenial and Bionic (at version 3.4) will not be patched for this issue, and will therefore be marked as ignored.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ffmpeg

Severity score breakdown

Parameter Value
Base score 8.1 · High
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H