Bug 2275678 (CVE-2024-26886)

Summary:	CVE-2024-26886 kernel: Bluetooth: af_bluetooth: Fix deadlock
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, 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 6.1.83, kernel 6.6.23, kernel 6.7.11, kernel 6.8.2, kernel 6.9-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel’s Bluetooth subsystem, specifically within the af_bluetooth module. The issue arises when attempting to perform a sock_lock on the .recvmsg method, leading to a deadlock situation. In this scenario, multiple tasks wait indefinitely for a resource, causing significant performance degradation or system crashes. The vulnerability occurs during Bluetooth operations, where tasks are blocked for more than 30 seconds, creating potential instability. The solution was to replace the sock_sock lock with the sk_receive_queue.lock in the bt_sock_ioctl function to prevent a use-after-free (UAF) condition and avoid the deadlock.	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:	2275679
Bug Blocks:	2275696

Description Robb Gatica 2024-04-17 18:04:25 UTC

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

Bluetooth: af_bluetooth: Fix deadlock

The Linux kernel CVE team has assigned CVE-2024-26886 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024041742-CVE-2024-26886-6345@gregkh/T

Comment 1 Robb Gatica 2024-04-17 18:04:58 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2275679]

Comment 10 Alex 2024-06-09 15:22:19 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-26886 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE LOCK DEADLOCK UAF NETWORK SKB  ; these flags parsed automatically based on patche data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.

Comment 12 errata-xmlrpc 2024-09-11 00:57:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:6567 https://access.redhat.com/errata/RHSA-2024:6567

Comment 13 errata-xmlrpc 2024-09-18 00:06:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:6745 https://access.redhat.com/errata/RHSA-2024:6745

Comment 14 errata-xmlrpc 2024-09-18 00:16:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:6744 https://access.redhat.com/errata/RHSA-2024:6744