Bug 2281863 (CVE-2024-35983)

Summary:	CVE-2024-35983 kernel: bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.4.275, kernel 5.10.216, kernel 5.15.158, kernel 6.1.90, kernel 6.6.30, kernel 6.8.9	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel related to the improper handling of power-of-two values for `CONFIG_NR_CPUS`. The `bits_per()` function incorrectly rounds up to the next power of two when given a power of two, causing crashes on certain systems.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2281864
Bug Blocks:	2282028

Description Robb Gatica 2024-05-20 16:08:49 UTC

In the Linux kernel, the following vulnerability has been resolved:

bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS

The Linux kernel CVE team has assigned CVE-2024-35983 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052018-CVE-2024-35983-a607@gregkh/T

Comment 1 Robb Gatica 2024-05-20 16:09:29 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2281864]

Comment 5 Alex 2024-06-09 14:28:35 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-35983 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown	 (where first YES/NO value means if related sources built).

Comment 6 errata-xmlrpc 2024-11-12 09:31:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9315 https://access.redhat.com/errata/RHSA-2024:9315