Bug 2516495 (CVE-2026-72355)

Summary: CVE-2026-72355 kernel: netfs: Fix barriering when walking subrequest list
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: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's netfs component. This vulnerability arises from incorrect barriering when processing the subrequest list, allowing a subrequest to be observed before it has been fully added by the application thread. This race condition could lead to unexpected system behavior or data inconsistencies.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-15 06:15:31 UTC
In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix barriering when walking subrequest list

Fix the barriering used when walking the subrequest list in retry as
there's a possibility of seeing a subreq that's just been added by the
application thread.