Bug 2516549 (CVE-2026-72106)

Summary:	CVE-2026-72106 kernel: dm-ioctl: fix a possible overflow in list_version_get_info
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:	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 `dm-ioctl` component of the Linux kernel. This vulnerability, a buffer overflow, occurs in the `list_version_get_info` function when the code attempts to write more data than the allocated buffer size. A local attacker could potentially exploit this to cause a denial of service or achieve privilege escalation.	Story Points:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:18:22 UTC

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

dm-ioctl: fix a possible overflow in list_version_get_info

sizeof(tt->version) is 12 bytes, but the code writes 16 bytes into the
output buffer - info->vers->version[0], info->vers->version[1],
info->vers->version[2] and info->vers->next. This can cause buffer
overflow.

Fix this buffer overflow by replacing "sizeof(tt->version)" with
"sizeof(struct dm_target_versions)".

Comment 1 Keith Grant 2026-08-17 22:04:18 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081525-CVE-2026-72106-67c1@gregkh/T