linux-cve-announce - CVE-2025-71230: hfs: ensure sb->s_fs

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Message-ID: <2026021804-CVE-2025-71230-8e25@gregkh>
Date: Wed, 18 Feb 2026 15:54:01 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-71230: hfs: ensure sb->s_fs_info is always cleaned up

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

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

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

hfs: ensure sb->s_fs_info is always cleaned up

When hfs was converted to the new mount api a bug was introduced by
changing the allocation pattern of sb->s_fs_info. If setup_bdev_super()
fails after a new superblock has been allocated by sget_fc(), but before
hfs_fill_super() takes ownership of the filesystem-specific s_fs_info
data it was leaked.

Fix this by freeing sb->s_fs_info in hfs_kill_super().

The Linux kernel CVE team has assigned CVE-2025-71230 to this issue.


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

	Fixed in 6.18.11 with commit 46c1d56ad321fb024761abd9af61a0cb616cf2f6
	Fixed in 6.19.1 with commit 399219831514126bc9541e8eadefe02c6fbd9166

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-2025-71230
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/hfs/mdb.c
	fs/hfs/super.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/46c1d56ad321fb024761abd9af61a0cb616cf2f6
	https://git.kernel.org/stable/c/399219831514126bc9541e8eadefe02c6fbd9166
	https://git.kernel.org/stable/c/05ce49a902be15dc93854cbfc20161205a9ee446