Bug 2219359 (CVE-2023-6176)

Summary:	CVE-2023-6176 kernel: local dos vulnerability in scatterwalk_copychunks
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, gnaik, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, scweaver, security-response-team, tglozar, vkumar, walters, wcosta, williams, wmealing, ycote, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A null pointer dereference flaw was found in the Linux kernel API for the cryptographic algorithm scatterwalk functionality. This issue occurs when a user constructs a malicious packet with specific socket configuration, which could allow a local user to crash the system or escalate their privileges on the system.	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:	2219362, 2219363, 2250069
Bug Blocks:	2219356

Description TEJ RATHI 2023-07-03 10:04:40 UTC

When the attacker carefully constructs the network packet to reach the above path, it will execute scatterwalk_copychunks(walk->src.virt.addr, &walk->in, bsize, 0); At this time, the calculated address is 0xdffffc0000000001, which is an invalid kernel address. Accessing this address will panic the kernel, bringing the system crash.

Comment 8 Alex 2023-11-16 13:42:17 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2250069]

Comment 11 Justin M. Forbes 2023-12-19 22:32:22 UTC

This was fixed for Fedora with the 6.5.4 stable kernel updates.

Comment 18 errata-xmlrpc 2024-04-30 10:10:18 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 19 errata-xmlrpc 2024-05-22 09:12:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2950 https://access.redhat.com/errata/RHSA-2024:2950

Comment 20 errata-xmlrpc 2024-05-22 09:50:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3138 https://access.redhat.com/errata/RHSA-2024:3138