Bug 1596773 (CVE-2018-10876)

Summary:	CVE-2018-10876 kernel: use-after-free in jbd2_journal_commit_transaction funtion
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, airlied, aquini, bhu, blc, bskeggs, dbaker, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rvrbovsk, sfowler, skozina, slawomir, steved, sthangav, trankin, vdronov, 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 flaw was found in the Linux kernel's ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-07-25 16:46:39 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:	1596774, 1596776, 1615845
Bug Blocks:	1596775

Description Laura Pardo 2018-06-29 17:14:19 UTC

A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.

References:

https://bugzilla.kernel.org/show_bug.cgi?id=199403

http://patchwork.ozlabs.org/patch/929239/

An upstream fix:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8844618d8aa7a9973e7b527d038a2a589665002c

Comment 1 Laura Pardo 2018-06-29 17:15:43 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1596774]

Comment 4 Justin M. Forbes 2018-07-16 14:31:31 UTC

This is fixed for Fedora with the 4.17.6 stable kernel update

Comment 8 errata-xmlrpc 2019-03-13 02:08:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0525 https://access.redhat.com/errata/RHSA-2019:0525