Bug 2150863 (CVE-2022-20154)

Summary:	CVE-2022-20154 kernel: possible use after free in lock_sock_nested of sock.c for the SCTP protocol
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw due to a race condition was found in the Linux kernel’s sctp_diag module. This flaw allows a local user to crash or potentially escalate their privileges on the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2043822, 2043823, 2150864, 2150872, 2150873, 2150874, 2150875
Bug Blocks:	2099268

Description Alex 2022-12-05 12:59:18 UTC

In lock_sock_nested of sock.c, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed.

Reference:
https://github.com/torvalds/linux/commit/5ec7d18d1813a5bead0b495045606c93873aecbb

Comment 1 Alex 2022-12-05 12:59:44 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2150864]

Comment 4 Justin M. Forbes 2022-12-08 15:33:56 UTC

This was fixed for Fedora with the 5.15.13 stable kernel updates.