linux-cve-announce - CVE-2025-21966: dm-flakey: Fix memory corruption in optional corrupt_bio

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Message-ID: <2025040145-CVE-2025-21966-afc6@gregkh>
Date: Tue,  1 Apr 2025 16:45:51 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21966: dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature

Description
===========

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

dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature

Fix memory corruption due to incorrect parameter being passed to bio_init

The Linux kernel CVE team has assigned CVE-2025-21966 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.5 with commit 1d9a943898533e83f20370c0e1448d606627522e and fixed in 6.6.84 with commit 818330f756f3800c37d738bd36bce60eac949938
	Issue introduced in 6.5 with commit 1d9a943898533e83f20370c0e1448d606627522e and fixed in 6.12.20 with commit 5a87e46da2418c57b445371f5ca0958d5779ba5f
	Issue introduced in 6.5 with commit 1d9a943898533e83f20370c0e1448d606627522e and fixed in 6.13.8 with commit da070843e153471be4297a12fdaa64023276f40e
	Issue introduced in 6.5 with commit 1d9a943898533e83f20370c0e1448d606627522e and fixed in 6.14 with commit 57e9417f69839cb10f7ffca684c38acd28ceb57b

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-21966
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/md/dm-flakey.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/818330f756f3800c37d738bd36bce60eac949938
	https://git.kernel.org/stable/c/5a87e46da2418c57b445371f5ca0958d5779ba5f
	https://git.kernel.org/stable/c/da070843e153471be4297a12fdaa64023276f40e
	https://git.kernel.org/stable/c/57e9417f69839cb10f7ffca684c38acd28ceb57b