Bug 2540404 (CVE-2026-93810)

Summary:	CVE-2026-93810 kernel: cachefiles: Fix double fput
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 CacheFiles module. An error-handling defect in the cachefiles_create_tmpfile() function causes a file reference to be released twice (double fput) during failure scenarios. A local user could exploit this vulnerability to trigger memory corruption, resulting in a Denial of Service (DoS) through a system crash or potentially allowing privilege escalation.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-24 16:42:37 UTC

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

cachefiles: Fix double fput

Fix a double fput() in error handling in cachefiles_create_tmpfile().

Comment 1 Mauro Matteo Cascella 2026-09-28 13:10:00 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93810.mbox