linux-cve-announce - CVE-2025-68767: hfsplus: Verify inode mode when loading from disk

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Message-ID: <2026011353-CVE-2025-68767-cd16@gregkh>
Date: Tue, 13 Jan 2026 16:28:53 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68767: hfsplus: Verify inode mode when loading from disk

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

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

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

hfsplus: Verify inode mode when loading from disk

syzbot is reporting that S_IFMT bits of inode->i_mode can become bogus when
the S_IFMT bits of the 16bits "mode" field loaded from disk are corrupted.

According to [1], the permissions field was treated as reserved in Mac OS
8 and 9. According to [2], the reserved field was explicitly initialized
with 0, and that field must remain 0 as long as reserved. Therefore, when
the "mode" field is not 0 (i.e. no longer reserved), the file must be
S_IFDIR if dir == 1, and the file must be one of S_IFREG/S_IFLNK/S_IFCHR/
S_IFBLK/S_IFIFO/S_IFSOCK if dir == 0.

The Linux kernel CVE team has assigned CVE-2025-68767 to this issue.


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

	Fixed in 6.1.160 with commit 001f44982587ad462b3002ee40c75e8df67d597d
	Fixed in 6.6.120 with commit 05ec9af3cc430683c97f76027e1c55ac6fd25c59
	Fixed in 6.12.64 with commit edfb2e602b5ba5ca6bf31cbac20b366efb72b156
	Fixed in 6.18.3 with commit 91f114bffa36ce56d0e1f60a0a44fc09baaefc79
	Fixed in 6.19-rc1 with commit 005d4b0d33f6b4a23d382b7930f7a96b95b01f39

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-2025-68767
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/hfsplus/inode.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/001f44982587ad462b3002ee40c75e8df67d597d
	https://git.kernel.org/stable/c/05ec9af3cc430683c97f76027e1c55ac6fd25c59
	https://git.kernel.org/stable/c/edfb2e602b5ba5ca6bf31cbac20b366efb72b156
	https://git.kernel.org/stable/c/91f114bffa36ce56d0e1f60a0a44fc09baaefc79
	https://git.kernel.org/stable/c/005d4b0d33f6b4a23d382b7930f7a96b95b01f39