Bug 1214772 (CVE-2023-4611)

Summary:	VUL-0: CVE-2023-4611: kernel: use after free race between mbind() and VMA-locked page fault
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Alexander Bergmann <abergmann>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	meissner, mhocko, security-team
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/376626/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-4611:7.0:(AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Alexander Bergmann 2023-08-30 07:03:28 UTC

CVE-2023-4611

A use-after-free flaw was found in mm/mempolicy.c in the memory management
subsystem in the Linux Kernel. This issue is caused by a race between mbind()
and VMA-locked page fault, and may allow a local attacker to crash the system or
lead to a kernel information leak.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-4611
https://bugzilla.redhat.com/show_bug.cgi?id=2227244
https://www.cve.org/CVERecord?id=CVE-2023-4611
https://access.redhat.com/security/cve/CVE-2023-4611
https://www.spinics.net/lists/stable-commits/msg310136.html

Comment 1 Michal Hocko 2023-08-30 07:59:45 UTC

This is 6.4+ issue. For us that means 15-sp6, ALP and stable branches. SP6 and ALP already have the fix via stable backport so I've just updated references. stable branch will get it eventually.

Comment 9 Gabriele Sonnu 2024-06-10 12:57:51 UTC

All done, closing.