Bug 1225562 (CVE-2023-52760)

Summary: VUL-0: CVE-2023-52760: kernel: gfs2: Fix slab-use-after-free in gfs2_qd_dealloc
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED FIXED QA Contact: Security Team bot <security-team>
Severity: Major    
Priority: P3 - Medium CC: ailiopoulos, glass.su, jlee, thomas.leroy
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/407143/
Whiteboard: CVSSv3.1:SUSE:CVE-2023-52760:6.4:(AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-05-29 08:10:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix slab-use-after-free in gfs2_qd_dealloc

In gfs2_put_super(), whether withdrawn or not, the quota should
be cleaned up by gfs2_quota_cleanup().

Otherwise, struct gfs2_sbd will be freed before gfs2_qd_dealloc (rcu
callback) has run for all gfs2_quota_data objects, resulting in
use-after-free.

Also, gfs2_destroy_threads() and gfs2_quota_cleanup() is already called
by gfs2_make_fs_ro(), so in gfs2_put_super(), after calling
gfs2_make_fs_ro(), there is no need to call them again.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52760
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2023/CVE-2023-52760.mbox
https://git.kernel.org/stable/c/08a28272faa750d4357ea2cb48d2baefd778ea81
https://git.kernel.org/stable/c/bdcb8aa434c6d36b5c215d02a9ef07551be25a37
https://www.cve.org/CVERecord?id=CVE-2023-52760
Comment 6 Andrea Mattiazzo 2024-06-24 13:49:07 UTC 
All done, closing.