Bug 2467070 (CVE-2026-43132)

Summary:	CVE-2026-43132 kernel: dm-verity: correctly handle dm_bufio_client_create() failure
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 dm-verity component. When the `dm_bufio_client_create()` function fails within `verity_fec_ctr()`, the subsequent call to `dm_bufio_client_destroy()` with an error pointer argument leads to a system crash. This vulnerability could allow a local attacker to cause a Denial of Service (DoS) by triggering this specific failure condition.	Story Points:	---
Clone Of:		Environment:
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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 2026-05-06 13:02:40 UTC

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

dm-verity: correctly handle dm_bufio_client_create() failure

If either of the calls to dm_bufio_client_create() in verity_fec_ctr()
fails, then dm_bufio_client_destroy() is later called with an ERR_PTR()
argument.  That causes a crash.  Fix this.

Comment 1 Keith Grant 2026-05-06 18:04:12 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050622-CVE-2026-43132-42ed@gregkh/T