Bug 2227244 (CVE-2023-4611)

Summary: CVE-2023-4611 kernel: Use after free race between mbind() and VMA-locked page fault
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, security-response-team, tglozar, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote, ymankad
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Kernel 6.5-rc4 Doc Type: If docs needed, set a value
Doc Text:
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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2227250, 2227251    
Bug Blocks: 2227245    

Description Pedro Sampaio 2023-07-28 13:44:36 UTC
A use-after-free flaw was found in mm/mempolicy.c in memory management subsystem in the Linux Kernel. This problem is caused by a race between mbind() and VMA-locked page fault, where a local attacker may crash the system, this flaw could even lead to a kernel information leak threat.

Refer:
https://www.spinics.net/lists/stable-commits/msg310136.html