Bug 2363493 (CVE-2022-49770)

Summary: CVE-2022-49770 kernel: ceph: avoid putting the realm twice when decoding snaps fails
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 15:06:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ceph: avoid putting the realm twice when decoding snaps fails

When decoding the snaps fails it maybe leaving the 'first_realm'
and 'realm' pointing to the same snaprealm memory. And then it'll
put it twice and could cause random use-after-free, BUG_ON, etc
issues.
Comment 1 Avinash Hanwate 2025-05-02 05:45:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050115-CVE-2022-49770-0b74@gregkh/T