linux-cve-announce - CVE-2023-53850: iavf: use internal state to free traffic IRQs

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Message-ID: <2025120900-CVE-2023-53850-5649@gregkh>
Date: Tue,  9 Dec 2025 10:31:34 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53850: iavf: use internal state to free traffic IRQs

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

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

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

iavf: use internal state to free traffic IRQs

If the system tries to close the netdev while iavf_reset_task() is
running, __LINK_STATE_START will be cleared and netif_running() will
return false in iavf_reinit_interrupt_scheme(). This will result in
iavf_free_traffic_irqs() not being called and a leak as follows:

    [7632.489326] remove_proc_entry: removing non-empty directory 'irq/999', leaking at least 'iavf-enp24s0f0v0-TxRx-0'
    [7632.490214] WARNING: CPU: 0 PID: 10 at fs/proc/generic.c:718 remove_proc_entry+0x19b/0x1b0

is shown when pci_disable_msix() is later called. Fix by using the
internal adapter state. The traffic IRQs will always exist if
state == __IAVF_RUNNING.

The Linux kernel CVE team has assigned CVE-2023-53850 to this issue.


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

	Issue introduced in 4.15 with commit 5b36e8d04b4439c9ceb814bfdfe1284737f9c632 and fixed in 6.1.42 with commit 6d9d01689b82ff5cb8f8d2a82717d7997bc0bfff
	Issue introduced in 4.15 with commit 5b36e8d04b4439c9ceb814bfdfe1284737f9c632 and fixed in 6.4.7 with commit 5e9db32eec628481f5da97a5b1aedb84a5240d18
	Issue introduced in 4.15 with commit 5b36e8d04b4439c9ceb814bfdfe1284737f9c632 and fixed in 6.5 with commit a77ed5c5b768e9649be240a2d864e5cd9c6a2015

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-2023-53850
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/iavf/iavf_main.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/6d9d01689b82ff5cb8f8d2a82717d7997bc0bfff
	https://git.kernel.org/stable/c/5e9db32eec628481f5da97a5b1aedb84a5240d18
	https://git.kernel.org/stable/c/a77ed5c5b768e9649be240a2d864e5cd9c6a2015