Bug 2219263 (CVE-2023-4394)

Summary: CVE-2023-4394 kernel: btrfs: memory leak in btrfs_get_dev_args_from_path()
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, bhu, chwhite, crwood, 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, rkeshri, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, security-response-team, tglozar, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote, ymankad
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Kernel 6.0-rc3 Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in btrfs_get_dev_args_from_path in fs/btrfs/volumes.c in btrfs file-system in the Linux Kernel. This flaw allows a local attacker with special privileges to cause a system crash or leak internal kernel information
 Story Points: ---
Clone Of: Environment:
Last Closed: 2023-08-17 07:27:29 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: 2219294, 2219295    
Bug Blocks: 2219643    

Description Dhananjay Arunesh 2023-07-03 06:31:46 UTC 
A use-after-free flaw was found in btrfs_get_dev_args_from_path in fs/btrfs/volumes.c in btrfs file-system in the Linux Kernel. In this flaw a local  attacker with some special privilege may cause a system crash or a leak of internal kernel information.

In btrfs_get_dev_args_from_path(), btrfs_get_bdev_and_sb() can fail if the path is invalid. In this case, btrfs_get_dev_args_from_path() returns directly without freeing args->uuid and args->fsid allocated before, which causes memory leaks.

References:
https://patchwork.kernel.org/project/linux-btrfs/patch/20220815151606.3479183-1-r33s3n6@gmail.com/
Comment 7 Product Security DevOps Team 2023-08-17 07:27:25 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-2023-4394