Bug 2070694 (CVE-2022-1199)

Summary:	CVE-2022-1199 kernel: Null pointer dereference and use after free in ax25_release()
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bdettelb, bhu, carnil, chwhite, crwood, dvlasenk, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, mleitner, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel v 5.18-rc4	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel. This flaw allows an attacker to crash the Linux kernel by simulating amateur radio from the user space, resulting in a null-ptr-deref vulnerability and a use-after-free vulnerability.	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:	2079085, 2070695, 2079079, 2079080, 2079081, 2079083, 2079084, 2079086
Bug Blocks:	2070696, 2070697

Description Pedro Sampaio 2022-03-31 16:58:10 UTC

There are null-ptr-deref vulnerability and use-after-free vulnerability that allow attacker to crash linux kernel by simulating Amateur Radio from user-space of linux.

Upstream fix:

https://github.com/torvalds/linux/commit/4e0f718daf97d47cf7dec122da1be970f145c809
https://github.com/torvalds/linux/commit/71171ac8eb34ce7fe6b3267dce27c313ab3cb3ac
https://github.com/torvalds/linux/commit/7ec02f5ac8a5be5a3f20611731243dc5e1d9ba10

Comment 1 Pedro Sampaio 2022-03-31 16:58:37 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2070695]

Comment 2 Justin M. Forbes 2022-03-31 21:46:33 UTC

This was fixed for Fedora with the 5.16.15 stable kernel updates.

Comment 3 Salvatore Bonaccorso 2022-04-02 11:55:08 UTC

https://www.openwall.com/lists/oss-security/2022/04/02/5