Bug 2347649 (CVE-2022-49651)

Summary: CVE-2022-49651 kernel: srcu: Tighten cleanup_srcu_struct() GP checks
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:01:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

srcu: Tighten cleanup_srcu_struct() GP checks

Currently, cleanup_srcu_struct() checks for a grace period in progress,
but it does not check for a grace period that has not yet started but
which might start at any time.  Such a situation could result in a
use-after-free bug, so this commit adds a check for a grace period that
is needed but not yet started to cleanup_srcu_struct().
Comment 1 Mauro Matteo Cascella 2025-02-26 13:10:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022620-CVE-2022-49651-601b@gregkh/T