Bug 1757380 (CVE-2016-10906)

Summary:	CVE-2016-10906 kernel: use-after-free in functions arc_emac_tx and arc_emac_tx_clean in drivers/net/ethernet/arc/emac_main.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
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, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dominik.mierzejewski, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rtillery, 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:	A use-after-free flaw was found in the Ethernet subsystem of the Linux kernel. A race condition was observed while a data transmission from a buffer occurred when the buffer was already freed causing a use-after-free problem.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-02-27 15:49:32 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:	1757381
Bug Blocks:	1757382

Description Dhananjay Arunesh 2019-10-01 10:51:43 UTC

An issue was discovered in drivers/net/ethernet/arc/emac_main.c in the Linux kernel. A use-after-free is caused by a race condition between the functions arc_emac_tx and arc_emac_tx_clean.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c278c253f3d992c6994d08aa0efb2b6806ca396f

Comment 1 Dhananjay Arunesh 2019-10-01 10:52:05 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1757381]

Comment 2 Justin M. Forbes 2019-10-01 13:55:04 UTC

This was fixed upstream in the 4.5 kernel and has never impacted any still currently supported version of Fedora.

Comment 4 Rohit Keshri 2020-02-27 11:52:09 UTC

Statement:

The affected code was not introduced into any kernel versions shipped with Red Hat Enterprise Linux making this vulnerable not applicable to these platforms.

Comment 5 Rohit Keshri 2020-02-27 11:52:17 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 7 Product Security DevOps Team 2020-02-27 15:49:32 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2016-10906