Bug 1221294 (CVE-2024-26617)

Summary: VUL-0: CVE-2024-26617: kernel: fs/proc/task_mmu: move mmu notification mechanism inside mm lock
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: Normal    
Priority: P3 - Medium CC: gabriele.sonnu, osalvador
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/397154/
Whiteboard:
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-03-12 13:06:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

fs/proc/task_mmu: move mmu notification mechanism inside mm lock

Move mmu notification mechanism inside mm lock to prevent race condition
in other components which depend on it.  The notifier will invalidate
memory range.  Depending upon the number of iterations, different memory
ranges would be invalidated.

The following warning would be removed by this patch:
WARNING: CPU: 0 PID: 5067 at arch/x86/kvm/../../../virt/kvm/kvm_main.c:734 kvm_mmu_notifier_change_pte+0x860/0x960 arch/x86/kvm/../../../virt/kvm/kvm_main.c:734

There is no behavioural and performance change with this patch when
there is no component registered with the mmu notifier.

[akpm@linux-foundation.org: narrow the scope of `range', per Sean]

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26617
https://git.kernel.org/stable/c/4cccb6221cae6d020270606b9e52b1678fc8b71a
https://www.cve.org/CVERecord?id=CVE-2024-26617
https://git.kernel.org/stable/c/05509adf297924f51e1493aa86f9fcde1433ed80
Comment 1 Gabriele Sonnu 2024-03-12 13:08:47 UTC 
Offending commit (52526ca7fdb9) is only in stable, that also contain the fix (05509adf2979). @kernel-team, please add the reference.
Comment 2 Oscar Salvador 2024-04-17 03:05:26 UTC 
Nothing to do.
Back to sec-team.
Comment 3 Gabriele Sonnu 2024-06-10 12:25:34 UTC 
All done, closing.