Bug 1224478 (CVE-2024-35918)

Summary:	VUL-0: CVE-2024-35918: kernel: randomize_kstack: Improve entropy diffusion
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Michal Koutný <mkoutny>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	gabriele.sonnu, jlee, mkoutny, nik.borisov, nstange
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/406608/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-35918:5.5:(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 2024-05-20 13:01:18 UTC

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

randomize_kstack: Improve entropy diffusion

The kstack_offset variable was really only ever using the low bits for
kernel stack offset entropy. Add a ror32() to increase bit diffusion.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-35918
https://www.cve.org/CVERecord?id=CVE-2024-35918
https://git.kernel.org/stable/c/300a2b9c2b28282974ee300bb5d5025cbbb1f64c
https://git.kernel.org/stable/c/6be74b1e21f8de4c48af772c2f658b464bfe6145
https://git.kernel.org/stable/c/9c573cd313433f6c1f7236fe64b9b743500c1628
https://git.kernel.org/stable/c/dfb2ce952143de60dd756ed666901236c76cb3fa
https://git.kernel.org/stable/c/e80b4980af2688d8ff69c157ffa773dd1f1eb02c
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-35918.mbox

Comment 1 Joey Lee 2024-05-21 13:10:42 UTC

https://www.suse.com/security/cve/CVE-2024-35918.html
cvss 5.5