Bug 2541125 (CVE-2026-97545)

Summary:	CVE-2026-97545 kernel: xfs: don't leak new_bp if xfs_btree_bload_drop_buf fails
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel's XFS file system. When an input/output (I/O) error occurs while writing cached data buffers to disk during b-tree preparation, the kernel fails to release an allocated buffer. A local user performing file system operations could trigger this condition to leak locked buffers, leading to resource exhaustion and a denial of service (DoS).	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-25 10:50:30 UTC

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

xfs: don't leak new_bp if xfs_btree_bload_drop_buf fails

LOLLM observes that in xfs_btree_bload_prep_block,
xfs_btree_bload_drop_buf can hit an IO error if writing the delwri
buffer list to disk fails.  In this case, we fail to release new_bp,
which means we lose a locked buffer.  Fix that.

Comment 1 gkamathe 2026-09-28 22:24:00 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97545.mbox