Bug 2516612 (CVE-2026-72100)

Summary:	CVE-2026-72100 kernel: dm-integrity: fix a bug if the bio is out of limits
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's dm-integrity component. This issue occurs when the `dm_integrity_check_limits` function fails, leading to a resource remaining locked. A local attacker could potentially trigger this condition, resulting in a system deadlock and a Denial of Service (DoS).	Story Points:	---
Clone Of:		Environment:
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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 2026-08-15 06:21:53 UTC

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

dm-integrity: fix a bug if the bio is out of limits

If dm_integrity_check_limits fails, the code would exit with
DM_MAPIO_KILL. However, the range would be already locked at this point,
and it wouldn't be unlocked, resulting in a deadlock. Let's move the
limit check up, so that when it exits, no resources are leaked.

Comment 1 Keith Grant 2026-08-17 21:39:53 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081524-CVE-2026-72100-ed1a@gregkh/T