Bug 2363490 (CVE-2022-49798)

Summary: CVE-2022-49798 kernel: tracing: Fix race where eprobes can be called before the event
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 2025-05-01 15:06:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tracing: Fix race where eprobes can be called before the event

The flag that tells the event to call its triggers after reading the event
is set for eprobes after the eprobe is enabled. This leads to a race where
the eprobe may be triggered at the beginning of the event where the record
information is NULL. The eprobe then dereferences the NULL record causing
a NULL kernel pointer bug.

Test for a NULL record to keep this from happening.
Comment 1 Avinash Hanwate 2025-05-02 06:15:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050125-CVE-2022-49798-7e07@gregkh/T