linux-cve-announce - CVE-2026-23023: idpf: fix memory leak in idpf_vport

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Message-ID: <2026013136-CVE-2026-23023-0601@gregkh>
Date: Sat, 31 Jan 2026 12:39:44 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23023: idpf: fix memory leak in idpf_vport_rel()

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

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

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

idpf: fix memory leak in idpf_vport_rel()

Free vport->rx_ptype_lkup in idpf_vport_rel() to avoid leaking memory
during a reset. Reported by kmemleak:

unreferenced object 0xff450acac838a000 (size 4096):
  comm "kworker/u258:5", pid 7732, jiffies 4296830044
  hex dump (first 32 bytes):
    00 00 00 00 00 10 00 00 00 10 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00  ................
  backtrace (crc 3da81902):
    __kmalloc_cache_noprof+0x469/0x7a0
    idpf_send_get_rx_ptype_msg+0x90/0x570 [idpf]
    idpf_init_task+0x1ec/0x8d0 [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-2026-23023 to this issue.


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

	Issue introduced in 6.7 with commit 0fe45467a1041ea3657a7fa3a791c84c104fbd34 and fixed in 6.12.66 with commit a4212d6732e3f674c6cc7d0b642f276d827e8f94
	Issue introduced in 6.7 with commit 0fe45467a1041ea3657a7fa3a791c84c104fbd34 and fixed in 6.18.6 with commit ec602a2a4071eb956d656ba968c58fee09f0622d
	Issue introduced in 6.7 with commit 0fe45467a1041ea3657a7fa3a791c84c104fbd34 and fixed in 6.19-rc5 with commit f6242b354605faff263ca45882b148200915a3f6

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-2026-23023
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_lib.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/a4212d6732e3f674c6cc7d0b642f276d827e8f94
	https://git.kernel.org/stable/c/ec602a2a4071eb956d656ba968c58fee09f0622d
	https://git.kernel.org/stable/c/f6242b354605faff263ca45882b148200915a3f6