Bug 2281052 (CVE-2024-35791)

Summary:	CVE-2024-35791 kernel: KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
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, rysulliv, scweaver, sidakwo, 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 5.10.215, kernel 5.15.154, kernel 6.1.84, kernel 6.6.24, kernel 6.7.12, kernel 6.8	Doc Type:	If docs needed, set a value
Doc Text:	A security vulnerability was identified in the Linux kernel's Kernel-based Virtual Machine subsystem (KVM), specifically affecting the Secure Virtual Machine (SVM) feature used on AMD processors. The issue arises from a use-after-free condition in the svm_register_enc_region() function, which can lead to system instability or potential exploitation.	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:	2281053
Bug Blocks:	2281733

Description Zack Miele 2024-05-17 21:02:22 UTC

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

KVM: SVM: Flush pages under kvm-&gt;lock to fix UAF in svm_register_enc_region()

The Linux kernel CVE team has assigned CVE-2024-35791 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024051708-CVE-2024-35791-65ad@gregkh/T

Comment 1 Zack Miele 2024-05-17 21:02:59 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2281053]

Comment 5 Alex 2024-06-09 16:06:43 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-35791 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is an approximation based on flags LOCK VIRT INIT UAF  ; these flags parsed automatically based on patch 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 18 errata-xmlrpc 2024-07-24 13:12:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:4823 https://access.redhat.com/errata/RHSA-2024:4823

Comment 19 errata-xmlrpc 2024-07-24 13:24:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:4831 https://access.redhat.com/errata/RHSA-2024:4831

Comment 20 errata-xmlrpc 2024-09-11 00:57:17 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