Bug 2516487 (CVE-2026-72366)

Summary: CVE-2026-72366 kernel: netfs: Fix netfs_create_write_req() to handle async cache object creation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2026-08-15 06:15:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix netfs_create_write_req() to handle async cache object creation

netfs_create_write_req() will skip caching if the fscache cookie is
disabled, but this is a problem because async cache object creation might
not have got far enough yet that has been enabled - thereby causing the
call to fscache_begin_write_operation() to be skipped.

Fix this by removing the checks on the cookie and delegating this to
fscache_begin_write_operation().
Comment 1 Keith Grant 2026-08-20 12:56:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081515-CVE-2026-72366-5da5@gregkh/T