Bug 2363735 (CVE-2023-53044)

Summary: CVE-2023-53044 kernel: dm stats: check for and propagate alloc_percpu failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-02 16:03:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dm stats: check for and propagate alloc_percpu failure

Check alloc_precpu()'s return value and return an error from
dm_stats_init() if it fails. Update alloc_dev() to fail if
dm_stats_init() does.

Otherwise, a NULL pointer dereference will occur in dm_stats_cleanup()
even if dm-stats isn't being actively used.
Comment 1 Avinash Hanwate 2025-05-05 06:37:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050203-CVE-2023-53044-2d25@gregkh/T