Bug 1228139 (CVE-2024-0562)

Summary: VUL-0: CVE-2024-0562: kernel: use-after-free after removing device in wb_inode_writeback_end in mm/page-writeback.c
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Kernel Bugs <kernel-bugs>
Status: NEW --- QA Contact: Security Team bot <security-team>
Severity: Major    
Priority: P3 - Medium CC: abergmann
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/391216/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-0562:4.5:(AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-07-19 09:46:01 UTC 
A use-after-free flaw was found in the Linux Kernel. When a disk is removed, bdi_unregister is called to stop further write-back and waits for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation work after this has completed, which can result in the timer attempting to access the recently freed bdi_writeback.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-0562
https://bugzilla.redhat.com/show_bug.cgi?id=2258475
https://www.cve.org/CVERecord?id=CVE-2024-0562
https://access.redhat.com/security/cve/CVE-2024-0562
https://patchwork.kernel.org/project/linux-mm/patch/20220801155034.3772543-1-khazhy@google.com/
https://access.redhat.com/errata/RHSA-2024:0412