Bug 1652650 (CVE-2018-19406)

Summary:	CVE-2018-19406 kernel: kvm: NULL pointer dereference in kvm_pv_send_ipi in arch/x86/kvm/lapic.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dbaker, dhoward, dvlasenk, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, 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 NULL pointer dereference security flaw was found in the Linux kernel in kvm_pv_send_ipi() in arch/x86/kvm/lapic.c. This allows local users with certain privileges to cause a denial of service via a crafted system call to the KVM subsystem.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:06:13 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:	1653344, 1653345, 1653346
Bug Blocks:	1652659

Description Laura Pardo 2018-11-22 14:24:48 UTC

A NULL pointer dereference security flaw was found in the Linux kernel in kvm_pv_send_ipi() in arch/x86/kvm/lapic.c. This allows local users with certain privileges to cause a denial of service via a crafted system call to the KVM subsystem.

References:

https://marc.info/?t=154270881000036&r=1&w=2

https://lkml.org/lkml/2018/11/20/411

Introduced by:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4180bf1b655a791a0a6ef93a2ffffc762722c782

A suggested patch:

https://marc.info/?l=linux-kernel&m=154270004301496&w=2

Comment 3 Vladis Dronov 2018-11-26 15:35:31 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1653346]

Comment 5 Product Security DevOps Team 2019-07-12 13:06:13 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-2018-19406