Bug 2043520 (CVE-2022-23222)

Summary:	CVE-2022-23222 kernel: local privileges escalation in kernel/bpf/verifier.c
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
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, dvlasenk, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jfaracco, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.17 rc1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel's adjust_ptr_min_max_vals in the kernel/bpf/verifier.c function. In this flaw, a missing sanity check for *_OR_NULL pointer types that perform pointer arithmetic may cause a kernel information leak issue.	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:	2043521, 2053105, 2053106, 2053107, 2053108
Bug Blocks:	2043522

Description Marian Rehak 2022-01-21 12:53:59 UTC

Local privileges escalation possible because of the availability of pointer arithmetic via certain *_OR_NULL pointer types in kernel/bpf/verifier.c.

Reference:

https://www.openwall.com/lists/oss-security/2022/01/13/1

Comment 1 Marian Rehak 2022-01-21 12:54:22 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2043521]

Comment 18 errata-xmlrpc 2024-02-07 16:28:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0724 https://access.redhat.com/errata/RHSA-2024:0724