linux-cve-announce - CVE-2026-23153: firewire: core: fix race condition against transaction list

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Message-ID: <2026021415-CVE-2026-23153-9e56@gregkh>
Date: Sat, 14 Feb 2026 17:04:19 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-23153: firewire: core: fix race condition against transaction list

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

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

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

firewire: core: fix race condition against transaction list

The list of transaction is enumerated without acquiring card lock when
processing AR response event. This causes a race condition bug when
processing AT request completion event concurrently.

This commit fixes the bug by put timer start for split transaction
expiration into the scope of lock. The value of jiffies in card structure
is referred before acquiring the lock.

The Linux kernel CVE team has assigned CVE-2026-23153 to this issue.


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

	Issue introduced in 6.18 with commit b5725cfa4120a4d234ab112aad151d731531d093 and fixed in 6.18.9 with commit b038874e31fc3caa0b0d5abd259dd54b918ad4a1
	Issue introduced in 6.18 with commit b5725cfa4120a4d234ab112aad151d731531d093 and fixed in 6.19 with commit 20e01bba2ae4898ce65cdcacd1bd6bec5111abd9

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-2026-23153
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/firewire/core-transaction.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/b038874e31fc3caa0b0d5abd259dd54b918ad4a1
	https://git.kernel.org/stable/c/20e01bba2ae4898ce65cdcacd1bd6bec5111abd9