linux-cve-announce - CVE-2025-37773: virtiofs: add filesystem context source name check

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Message-ID: <2025050114-CVE-2025-37773-4727@gregkh>
Date: Thu,  1 May 2025 15:07:21 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37773: virtiofs: add filesystem context source name check

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

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

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

virtiofs: add filesystem context source name check

In certain scenarios, for example, during fuzz testing, the source
name may be NULL, which could lead to a kernel panic. Therefore, an
extra check for the source name should be added.

The Linux kernel CVE team has assigned CVE-2025-37773 to this issue.


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

	Issue introduced in 5.4 with commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a and fixed in 6.1.135 with commit 599d1e2a6aecc44acf22fe7ea6f5e84a7e526abe
	Issue introduced in 5.4 with commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a and fixed in 6.6.88 with commit f6ec52710dc5e156b774cbef5d0f5c99b1c53a80
	Issue introduced in 5.4 with commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a and fixed in 6.12.25 with commit c3e31d613951c299487844c4d1686a933e8ee291
	Issue introduced in 5.4 with commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a and fixed in 6.14.4 with commit a648d80f8d9b208beee03a2d9aa690cfacf1d41e
	Issue introduced in 5.4 with commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a and fixed in 6.15-rc3 with commit a94fd938df2b1628da66b498aa0eeb89593bc7a2

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-2025-37773
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:
	fs/fuse/virtio_fs.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/599d1e2a6aecc44acf22fe7ea6f5e84a7e526abe
	https://git.kernel.org/stable/c/f6ec52710dc5e156b774cbef5d0f5c99b1c53a80
	https://git.kernel.org/stable/c/c3e31d613951c299487844c4d1686a933e8ee291
	https://git.kernel.org/stable/c/a648d80f8d9b208beee03a2d9aa690cfacf1d41e
	https://git.kernel.org/stable/c/a94fd938df2b1628da66b498aa0eeb89593bc7a2