Bug 2265518 (CVE-2024-26582)

Summary:	CVE-2024-26582 kernel: tls: use-after-free with partial reads and async decrypt
Product:	[Other] Security Response	Reporter:	Patrick Del Bello <pdelbell>
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, jforbes, jlelli, joe.lawrence, jpoimboe, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mcascell, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.8-rc5	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free vulnerability was found in the tls subsystem of the Linux kernel. The tls_decrypt_sg() function doesn't take references on the pages from clear_skb, so the put_page() in tls_decrypt_done() releases them and a use-after-free can be triggered in process_rx_list when trying to read from the partially-read skb. This issue could lead to a denial of service condition or code execution.	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:	2265529
Bug Blocks:	2265516

Description Patrick Del Bello 2024-02-22 14:28:54 UTC

tls_decrypt_sg doesn't take a reference on the pages from clear_skb, so the put_page() in tls_decrypt_done releases them, and we trigger a use-after-free in process_rx_list when we try to read from the partially-read skb.

Comment 1 Mauro Matteo Cascella 2024-02-22 15:15:08 UTC

Kernel security advisory:
https://lore.kernel.org/linux-cve-announce/2024022139-spruce-prelude-c358@gregkh/T/#u

Upstream fix:
https://github.com/torvalds/linux/commit/32b55c5ff910

Comment 2 Mauro Matteo Cascella 2024-02-22 15:17:13 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2265529]

Comment 12 errata-xmlrpc 2024-04-18 01:47:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:1882 https://access.redhat.com/errata/RHSA-2024:1882

Comment 13 errata-xmlrpc 2024-04-18 02:28:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:1881 https://access.redhat.com/errata/RHSA-2024:1881

Comment 14 errata-xmlrpc 2024-04-30 10:15:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394

Comment 15 Alex 2024-06-09 15:05:52 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-26582 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags REMOTE READ SIMPLEFIX UAF 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.