Bug 1223205 (CVE-2024-26914)

Summary:	VUL-0: CVE-2024-26914: kernel: drm/amd/display: fix incorrect mpc_combine array size
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Kernel Bugs <kernel-bugs>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P5 - None	CC:	abergmann
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/402452/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-26914:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-04-22 10:10:22 UTC

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: fix incorrect mpc_combine array size

[why]
MAX_SURFACES is per stream, while MAX_PLANES is per asic. The
mpc_combine is an array that records all the planes per asic. Therefore
MAX_PLANES should be used as the array size. Using MAX_SURFACES causes
array overflow when there are more than 3 planes.

[how]
Use the MAX_PLANES for the mpc_combine array size.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26914
https://www.cve.org/CVERecord?id=CVE-2024-26914
https://git.kernel.org/stable/c/0bd8ef618a42d7e6ea3f701065264e15678025e3
https://git.kernel.org/stable/c/39079fe8e660851abbafa90cd55cbf029210661f
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26914.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2275792

Comment 1 Alexander Bergmann 2024-04-22 10:10:50 UTC

None of our SLE or openSUSE kernels are affected.