linux-cve-announce - CVE-2023-53303: net: microchip: vcap api: Fix possible memory leak for vcap_dup

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Message-ID: <2025091628-CVE-2023-53303-c5cc@gregkh>
Date: Tue, 16 Sep 2025 10:11:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53303: net: microchip: vcap api: Fix possible memory leak for vcap_dup_rule()

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

net: microchip: vcap api: Fix possible memory leak for vcap_dup_rule()

Inject fault When select CONFIG_VCAP_KUNIT_TEST, the below memory leak
occurs. If kzalloc() for duprule succeeds, but the following
kmemdup() fails, the duprule, ckf and caf memory will be leaked. So kfree
them in the error path.

unreferenced object 0xffff122744c50600 (size 192):
  comm "kunit_try_catch", pid 346, jiffies 4294896122 (age 911.812s)
  hex dump (first 32 bytes):
    10 27 00 00 04 00 00 00 1e 00 00 00 2c 01 00 00  .'..........,...
    00 00 00 00 00 00 00 00 18 06 c5 44 27 12 ff ff  ...........D'...
  backtrace:
    [<00000000394b0db8>] __kmem_cache_alloc_node+0x274/0x2f8
    [<0000000001bedc67>] kmalloc_trace+0x38/0x88
    [<00000000b0612f98>] vcap_dup_rule+0x50/0x460
    [<000000005d2d3aca>] vcap_add_rule+0x8cc/0x1038
    [<00000000eef9d0f8>] test_vcap_xn_rule_creator.constprop.0.isra.0+0x238/0x494
    [<00000000cbda607b>] vcap_api_rule_remove_in_front_test+0x1ac/0x698
    [<00000000c8766299>] kunit_try_run_case+0xe0/0x20c
    [<00000000c4fe9186>] kunit_generic_run_threadfn_adapter+0x50/0x94
    [<00000000f6864acf>] kthread+0x2e8/0x374
    [<0000000022e639b3>] ret_from_fork+0x10/0x20

The Linux kernel CVE team has assigned CVE-2023-53303 to this issue.


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

	Issue introduced in 6.3 with commit 814e7693207f1bd936d600f9b5467f133e3d6e40 and fixed in 6.5.4 with commit a26ba60413b2c8f95daf0ee0152cf82abd7bfbe4
	Issue introduced in 6.3 with commit 814e7693207f1bd936d600f9b5467f133e3d6e40 and fixed in 6.6 with commit 281f65d29d6da1a9b6907fb0b145aaf34f4e4822

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-2023-53303
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/ethernet/microchip/vcap/vcap_api.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/a26ba60413b2c8f95daf0ee0152cf82abd7bfbe4
	https://git.kernel.org/stable/c/281f65d29d6da1a9b6907fb0b145aaf34f4e4822