Bug 1874535 (CVE-2020-29372)

Summary:	CVE-2020-29372 kernel: IORING_OP_MADVISE races with coredumping
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, gsuckevi, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, ptalbert, qzhao, rt-maint, rvrbovsk, steved, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-18 08:41:03 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:	1874559, 1874560, 1877755
Bug Blocks:	1870590, 1903285

Description Pedro Sampaio 2020-09-01 14:49:21 UTC

A flaw was found in Linux kernel. Race condition between IORING_OP_MADVISE and coredumping might end up in loss of availability.

References:

https://bugs.chromium.org/p/project-zero/issues/detail?id=2029

Comment 2 Petr Matousek 2020-09-10 11:30:50 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1877755]

Comment 3 Justin M. Forbes 2020-09-10 14:44:29 UTC

This was fixed for Fedora with the 5.6.8 stable update.

Comment 4 Rohit Keshri 2020-10-06 08:44:17 UTC

Statement:

There was no shipped kernel version were seen affected with this problem.

Comment 6 Petr Matousek 2020-12-10 12:44:35 UTC

*** Bug 1903283 has been marked as a duplicate of this bug. ***