Bug 2139586 (CVE-2022-2602)

Summary:	CVE-2022-2602 kernel: use-after-free when an io_uring request is being processed
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, allarkin, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dhoward, dvlasenk, ezulian, fhrbata, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, pabeni, ptalbert, qzhao, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.1 rc1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel. A race issue occurs between an io_uring request and the Unix socket garbage collector, allowing an attacker local privilege escalation.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-07 20:32:40 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2139589, 2139590, 2139591, 2139592
Bug Blocks:	2136005

Description Rohit Keshri 2022-11-03 03:22:18 UTC

The vulnerability is a use-after-free that happens when an io_uring request
is being processed on a registered file and the Unix GC runs and frees the
io_uring fd and all the registered fds. The order at which the Unix GC
processes the inflight fds may lead to registered fds be freed before the
io_uring is released and has the chance to unregister and wait for such
requests to finish.

Reference:
https://www.openwall.com/lists/oss-security/2022/10/18/4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0091bfc81741b8d3aeb3b7ab8636f911b2de6e80

Comment 8 Product Security DevOps Team 2022-12-07 20:32:36 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-2602