Bug 2187931 (CVE-2023-2176)

Summary:	CVE-2023-2176 Kernel: Slab-out-of-bound read in compare_netdev_and_ip
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, 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, swood, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
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 vulnerability was found in compare_netdev_and_ip in drivers/infiniband/core/cma.c in RDMA in the Linux kernel. An improper cleanup results in an out-of-boundary read. This flaw allows a local user to crash or escalate 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:	2187937, 2187939, 2187935, 2187936, 2187938
Bug Blocks:	2158739

Description Rohit Keshri 2023-04-19 07:00:27 UTC

The improper cleanup of resolve_prepare_src leads to a key mismatch or duplicate key in the cma id tree, which results in out-of-boundary in compare_netdev_and_ip. The issue was found in drivers/infiniband/core/cma.c in Linux in 6.1. A local user can utilize this bug to crash the system or escalation of privilege.

Affected component: rdma driver

References:
https://lkml.org/lkml/2022/12/9/178
https://www.spinics.net/lists/linux-rdma/msg114749.html
https://patchwork.kernel.org/project/linux-rdma/patch/3d0e9a2fd62bc10ba02fed1c7c48a48638952320.1672819273.git.leonro@nvidia.com/

Comment 2 Rohit Keshri 2023-04-19 07:15:56 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2187935]