linux-cve-announce - CVE-2024-41149: block: avoid to reuse `hctx` not removed from cpuhp callback list

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Message-ID: <2025011141-CVE-2024-41149-7e9b@gregkh>
Date: Sat, 11 Jan 2025 13:35:42 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-41149: block: avoid to reuse `hctx` not removed from cpuhp callback list

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

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

block: avoid to reuse `hctx` not removed from cpuhp callback list

If the 'hctx' isn't removed from cpuhp callback list, we can't reuse it,
otherwise use-after-free may be triggered.

The Linux kernel CVE team has assigned CVE-2024-41149 to this issue.


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

	Issue introduced in 6.12.6 with commit c1291ea131d186296dc8d328a36c3caf38e8e159 and fixed in 6.12.7 with commit b5792c162dcf6197bf3d2de2be6c8169435b73d0
	Issue introduced in 6.13-rc2 with commit 22465bbac53c821319089016f268a2437de9b00a and fixed in 6.13-rc4 with commit 85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b

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-2024-41149
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:
	block/blk-mq.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/ee18012c80155f6809522804099621070c69ec72
	https://git.kernel.org/stable/c/b5792c162dcf6197bf3d2de2be6c8169435b73d0
	https://git.kernel.org/stable/c/85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b