Bug 1696020 (CVE-2019-2025)

Summary:	CVE-2019-2025 kernel: Use-after-free due to race condition in android/binder.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, 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:	2019-04-16 12:14:07 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:	1696021
Bug Blocks:	1696022

Description Pedro Sampaio 2019-04-04 03:13:39 UTC

A race condition in the Linux kernel may lead to malicious code being able to free buffers using the BC_FREE_BUFFER ioctl to binder and trigger use-after-free in android/binder.c causing denial of service.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bada55ab50697861eee6bb7d60b41e68a961a9c

Comment 1 Pedro Sampaio 2019-04-04 03:14:03 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1696021]

Comment 2 Justin M. Forbes 2019-04-04 13:12:10 UTC

While Fedora does not enable the android drivers, this was fixed upstream in 4.20 kernels.