linux-cve-announce - CVE-2025-21774: can: rockchip: rkcanfd_handle_rx_fifo_overflow_int(): bail out if skb cannot be allocated

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Message-ID: <2025022606-CVE-2025-21774-26d5@gregkh>
Date: Wed, 26 Feb 2025 18:17:30 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21774: can: rockchip: rkcanfd_handle_rx_fifo_overflow_int(): bail out if skb cannot be allocated

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

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

can: rockchip: rkcanfd_handle_rx_fifo_overflow_int(): bail out if skb cannot be allocated

Fix NULL pointer check in rkcanfd_handle_rx_fifo_overflow_int() to
bail out if skb cannot be allocated.

The Linux kernel CVE team has assigned CVE-2025-21774 to this issue.


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

	Issue introduced in 6.12 with commit ff60bfbaf67f219c634cfe89a52250efe8e600d0 and fixed in 6.12.16 with commit 118fb35681bd2c0d2afa22f7be0ef94bb4d06849
	Issue introduced in 6.12 with commit ff60bfbaf67f219c634cfe89a52250efe8e600d0 and fixed in 6.13.4 with commit 946750e7865df2e70045071051abf768785dd570
	Issue introduced in 6.12 with commit ff60bfbaf67f219c634cfe89a52250efe8e600d0 and fixed in 6.14-rc3 with commit f7f0adfe64de08803990dc4cbecd2849c04e314a

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-2025-21774
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/net/can/rockchip/rockchip_canfd-core.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/118fb35681bd2c0d2afa22f7be0ef94bb4d06849
	https://git.kernel.org/stable/c/946750e7865df2e70045071051abf768785dd570
	https://git.kernel.org/stable/c/f7f0adfe64de08803990dc4cbecd2849c04e314a