Bug 2516661 (CVE-2026-72364)

Summary: CVE-2026-72364 kernel: netfs: Fix writeback error handling
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   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the `netfs` component of the Linux kernel. This vulnerability arises from improper error handling in the `writeback_iter()` loop. When an error occurs during writeback operations, the system fails to correctly clean up iteration states and manage memory folios. This can lead to resource mismanagement and potential system instability, affecting the reliability of network file system operations.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:24:31 UTC
In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix writeback error handling

Fix the error handling in writeback_iter() loop.  If an error occurs,
writeback_iter() needs to be called again with *error set to the error so
that it can clean up iteration state.  Further, the current folio needs
unlocking and redirtying.