linux-cve-announce - CVE-2026-23022: idpf: fix memory leak in idpf_vc_core

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Message-ID: <2026013136-CVE-2026-23022-fe24@gregkh>
Date: Sat, 31 Jan 2026 12:39:43 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23022: idpf: fix memory leak in idpf_vc_core_deinit()

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

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

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

idpf: fix memory leak in idpf_vc_core_deinit()

Make sure to free hw->lan_regs. Reported by kmemleak during reset:

unreferenced object 0xff1b913d02a936c0 (size 96):
  comm "kworker/u258:14", pid 2174, jiffies 4294958305
  hex dump (first 32 bytes):
    00 00 00 c0 a8 ba 2d ff 00 00 00 00 00 00 00 00  ......-.........
    00 00 40 08 00 00 00 00 00 00 25 b3 a8 ba 2d ff  ..@.......%...-.
  backtrace (crc 36063c4f):
    __kmalloc_noprof+0x48f/0x890
    idpf_vc_core_init+0x6ce/0x9b0 [idpf]
    idpf_vc_event_task+0x1fb/0x350 [idpf]
    process_one_work+0x226/0x6d0
    worker_thread+0x19e/0x340
    kthread+0x10f/0x250
    ret_from_fork+0x251/0x2b0
    ret_from_fork_asm+0x1a/0x30

The Linux kernel CVE team has assigned CVE-2026-23022 to this issue.


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

	Issue introduced in 6.17 with commit 6aa53e861c1a0c042690c9b7c5c153088ae61079 and fixed in 6.18.6 with commit 23391db8a00c23854915b8b72ec1aa10080aa540
	Issue introduced in 6.17 with commit 6aa53e861c1a0c042690c9b7c5c153088ae61079 and fixed in 6.19-rc5 with commit e111cbc4adf9f9974eed040aeece7e17460f6bff

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-2026-23022
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/intel/idpf/idpf_virtchnl.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/23391db8a00c23854915b8b72ec1aa10080aa540
	https://git.kernel.org/stable/c/e111cbc4adf9f9974eed040aeece7e17460f6bff