Bug 1568011 (CVE-2018-10087)

Summary:	CVE-2018-10087 kernel: Undefined behavior in kernel/exit.c:kernel_wait4() function allows local denial of service
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	airlied, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.13	Doc Type:	If docs needed, set a value
Doc Text:	The kernel_wait4 function in kernel/exit.c in the Linux kernel, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service by triggering an attempted use of the -INT_MIN value.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-20 11:54:49 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:	1569960
Bug Blocks:	1568015

Description Adam Mariš 2018-04-16 15:12:28 UTC

The kernel_wait4 function in kernel/exit.c in the Linux kernel, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service by triggering an attempted use of the -INT_MIN value.

References:

https://marc.info/?l=linux-mm&m=149726503820915&w=2

An upstream fix:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dd83c161fbcc5d8be637ab159c0de015cbff5ba4

Comment 3 Vladis Dronov 2018-04-20 11:49:34 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1569960]

Comment 4 Vladis Dronov 2018-04-20 11:53:23 UTC

Note:

This bug is present in certain Red Hat products, but the security impact is absent. Therefore, we do not consider this bug to be a security flaw.

Comment 5 Justin M. Forbes 2018-04-20 17:22:16 UTC

This was fixed for Fedora with the 4.14 kernel updates.