Bug 2092549 (CVE-2022-1976)

Summary:	CVE-2022-1976 kernel: incorrect in-flight accounting in io_uring leads to use-after-free
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bdettelb, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, dhoward, dvlasenk, fhrbata, fpacheco, 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, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, security-response-team, steved, vkumar, walters, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.19-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel’s implementation of IO-URING. This flaw allows an attacker with local executable permission to create a string of requests that can cause a use-after-free flaw within the kernel. This issue leads to memory corruption and possible privilege escalation.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-08-23 05:42:17 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:	2096914
Bug Blocks:	2092550, 2092551

Description Marian Rehak 2022-06-01 19:21:36 UTC

A flaw was found in the Linux kernels implementation of IO-URING.   An attacker with a local executable permission can create a string of requests which is able to create a use-after-free flaw within the kernel creating memory corruption and possible privilege escalation.


Upstream:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9cae36a094e7e9d6e5fe8b6dcd4642138b3eb0c7

Comment 2 Marian Rehak 2022-06-14 14:36:24 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2096914]

Comment 3 Justin M. Forbes 2022-06-29 16:13:38 UTC

This was fixed for Fedora with the 5.18.6 stable kernel updates.