Bug 2184395 (CVE-2023-1859)

Summary:	CVE-2023-1859 kernel: Use after free in xen_9pfs_front_remove due to race condition
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hackerzheng666, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.3-rc7	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in xen_9pfs_front_removet in net/9p/trans_xen.c in Xen transport for 9pfs in the Linux Kernel. This flaw could allow a local attacker to crash the system due to a race problem, possibly leading to a kernel information leak.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-04-05 10:04:54 UTC	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:	2184593
Bug Blocks:	2184396

Description Pedro Sampaio 2023-04-04 14:23:46 UTC

Use after free in xen_9pfs_front_remove due to race condition.

References:

https://lore.kernel.org/all/20230313090002.3308025-1-zyytlz.wz@163.com/

Comment 2 Rohit Keshri 2023-04-05 06:19:09 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2184593]

Comment 4 Rohit Keshri 2023-04-05 06:25:59 UTC

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.

Comment 7 Product Security DevOps Team 2023-04-05 10:04:51 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-1859

Comment 8 hackerzheng666 2023-04-10 03:31:28 UTC

Credit Information:

Zheng Wang(@xmzyshypnc), Zhuorao Yang(@A1ex), Yang Hu(@BlueSheep) and Zong Cao(@P1umer)

Comment 9 hackerzheng666 2023-04-10 03:36:39 UTC

The newest patch will be applied to  6.3-rc7 soon:

https://lore.kernel.org/all/ZDM%2F4C0PlbbzV%2F0R@7e9e31583646/