Bug 2039178 (CVE-2021-4204)

Summary:	CVE-2021-4204 kernel: improper input validation may lead to privilege escalation
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, allarkin, bdettelb, bhu, bskeggs, chwhite, dvlasenk, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jfaracco, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rkeshri, rvrbovsk, scweaver, steved, swood, 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:	An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.	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:	2039896, 2055038, 2055039, 2055040, 2055041
Bug Blocks:	2039179, 2039180

Description Marian Rehak 2022-01-11 07:13:11 UTC

An out of bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This could allow a local attacker with a special privilege to crash the system or leak kernel internal information.

Reference:
https://www.openwall.com/lists/oss-security/2022/01/11/4

Comment 1 Guilherme de Almeida Suckevicz 2022-01-12 16:59:17 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2039896]