linux-cve-announce - CVE-2024-56606: af_packet: avoid erroring out after sock_init_data() in packet

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Message-ID: <2024122704-CVE-2024-56606-bf3b@gregkh>
Date: Fri, 27 Dec 2024 15:51:13 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56606: af_packet: avoid erroring out after sock_init_data() in packet_create()

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

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

af_packet: avoid erroring out after sock_init_data() in packet_create()

After sock_init_data() the allocated sk object is attached to the provided
sock object. On error, packet_create() frees the sk object leaving the
dangling pointer in the sock object on return. Some other code may try
to use this pointer and cause use-after-free.

The Linux kernel CVE team has assigned CVE-2024-56606 to this issue.


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

	Fixed in 5.4.287 with commit 71b22837a5e55ac27d6a14b9cdf2326587405c4f
	Fixed in 5.10.231 with commit 1dc1e1db927056cb323296e2294a855cd003dfe7
	Fixed in 5.15.174 with commit 132e615bb1d7cdec2d3cfbdec2efa630e923fd21
	Fixed in 6.1.120 with commit a6cf750b737374454a4e03a5ed449a3eb0c96414
	Fixed in 6.6.66 with commit 157f08db94123e2ba56877dd0ac88908b13a5dd0
	Fixed in 6.12.5 with commit fd09880b16d33aa5a7420578e01cd79148fa9829
	Fixed in 6.13-rc1 with commit 46f2a11cb82b657fd15bab1c47821b635e03838b

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-2024-56606
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:
	net/packet/af_packet.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/71b22837a5e55ac27d6a14b9cdf2326587405c4f
	https://git.kernel.org/stable/c/1dc1e1db927056cb323296e2294a855cd003dfe7
	https://git.kernel.org/stable/c/132e615bb1d7cdec2d3cfbdec2efa630e923fd21
	https://git.kernel.org/stable/c/a6cf750b737374454a4e03a5ed449a3eb0c96414
	https://git.kernel.org/stable/c/157f08db94123e2ba56877dd0ac88908b13a5dd0
	https://git.kernel.org/stable/c/fd09880b16d33aa5a7420578e01cd79148fa9829
	https://git.kernel.org/stable/c/46f2a11cb82b657fd15bab1c47821b635e03838b