Bug 1776367 (CVE-2019-19079)

Summary:	CVE-2019-19079 kernel: memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c leads to DoS
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
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, 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, 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:	A memory leak was discovered in the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before version 5.3. This flaw allows attackers to cause a denial of service due to memory consumption.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-12-13 14:09:24 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:	1776368
Bug Blocks:	1776369

Description Guilherme de Almeida Suckevicz 2019-11-25 14:32:49 UTC

A memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows attackers to cause a denial of service (memory consumption), aka CID-a21b7f0cff19.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/a21b7f0cff1906a93a0130b74713b15a0b36481d

Comment 1 Guilherme de Almeida Suckevicz 2019-11-25 14:34:07 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776368]

Comment 2 Justin M. Forbes 2019-11-25 15:53:14 UTC

This was fixed for Fedora with the 5.3.x kernel rebases.

Comment 6 Rohit Keshri 2019-12-13 14:00:03 UTC

External References:

Reference and upstream commit:
https://github.com/torvalds/linux/commit/a21b7f0cff1906a93a0130b74713b15a0b36481d

Comment 7 Rohit Keshri 2019-12-13 14:01:11 UTC

Statement:

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.

Comment 8 Product Security DevOps Team 2019-12-13 14:09:24 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-2019-19079