Bug 1763869 (CVE-2019-15924)

Summary:	CVE-2019-15924 kernel: null pointer dereference in drivers/net/ethernet/intel/fm10k/fm10k_main.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, 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 flaw was found in the way the fm10k driver in the Linux kernel reacted to memory-related errors during driver initialization. This flaw allows a local attacker to cause a denial of service and crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 09:55:29 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:	1763870, 1781387, 1820463, 1820464, 1820465, 1832214, 1832215
Bug Blocks:	1763871

Description Guilherme de Almeida Suckevicz 2019-10-21 19:21:22 UTC

An issue was discovered in the Linux kernel before 5.0.11. fm10k_init_module in drivers/net/ethernet/intel/fm10k/fm10k_main.c has a NULL pointer dereference because there is no -ENOMEM upon an alloc_workqueue failure.

Reference:
https://github.com/torvalds/linux/commit/01ca667133d019edc9f0a1f70a272447c84ec41f

Comment 1 Guilherme de Almeida Suckevicz 2019-10-21 19:21:41 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1763870]

Comment 2 Justin M. Forbes 2019-10-22 12:58:09 UTC

This was fixed for Fedora with the 5.0.11 stable kernel update.

Comment 3 Petr Matousek 2020-04-03 06:45:39 UTC

Statement:

This issue is rated as having Low impact because of the low memory conditions needed to trigger this issue.

Comment 4 Petr Matousek 2020-04-03 06:45:43 UTC

Mitigation:

To mitigate this issue, prevent module fm10k from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.