Bug 2524467 (CVE-2026-80535)

Summary:	CVE-2026-80535 kernel: xfs: don't double-lock when deleting a self-referential directory
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's XFS filesystem. When a local user or process attempts to delete a directory that refers to itself, the directory tree repair code incorrectly tries to acquire a lock on the same inode twice. This double-locking issue can lead to system instability or unexpected behavior, potentially resulting in a denial of service (DoS).	Story Points:	---
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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 2026-08-26 14:57:55 UTC

In the Linux kernel, the following vulnerability has been resolved:

xfs: don't double-lock when deleting a self-referential directory

LOLLM notices that the dirtree scrubber can detect a directory that
refers to itself.  In this case, it's not correct for the directory tree
repair code to try to iolock/ilock both sc->ip and dp, because they're
the same inode.  Fix this by detecting that corner case and handling it
appropriately.

Comment 1 Mauro Matteo Cascella 2026-08-26 17:00:20 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082604-CVE-2026-80535-abd7@gregkh/T