Bug 2347287

Summary:	CVE-2025-27091 openh264: decoding functions heap overflow [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Dominik 'Rathann' Mierzejewski <dominik>
Component:	openh264	Assignee:	Wim Taymans <wtaymans>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	klember, linux, mike, wtaymans
Target Milestone:	---	Keywords:	SecurityTracking
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Hardware:	Unspecified
OS:	Unspecified
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Blocks:	2218117

Description Dominik 'Rathann' Mierzejewski 2025-02-24 10:49:47 UTC

Description of problem:
A vulnerability in the decoding functions of OpenH264 codec library could allow a remote, unauthenticated attacker to trigger a heap overflow.

This vulnerability is due to a race condition between a Sequence Parameter Set (SPS) memory allocation and a subsequent non Instantaneous Decoder Refresh (non-IDR) Network Abstraction Layer (NAL) unit memory usage. An attacker could exploit this vulnerability by crafting a malicious bitstream and tricking a victim user into processing an arbitrary video containing the malicious bistream. An exploit could allow the attacker to cause an unexpected crash in the victim's user decoding client and, possibly, perform arbitrary commands on the victim's host by abusing the heap overflow.

Version-Release number of selected component (if applicable):
openh264-2.5.0-1.fc43

Additional info:
Fixed in v2.6.0 (https://github.com/cisco/openh264/commit/63db555e30986e3a5f07871368dc90ae78c27449).

Debian advisory: https://security-tracker.debian.org/tracker/CVE-2025-27091 .

Comment 1 Dominik 'Rathann' Mierzejewski 2025-02-24 10:50:18 UTC

CVSS v4 rating: 8.6 (High).

Comment 2 Chris Adams 2025-04-29 12:32:08 UTC

I see builds in koji, but nothing has been pushed to the codecs/open264 repo. What is the holdup?

Comment 3 W. Michael Petullo 2025-05-29 20:15:10 UTC

Here is some documentation about the delay:

https://pagure.io/releng/issue/12617

See "That's a very good question" in the issue discussion.