linux-cve-announce - CVE-2024-56627: ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream

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Message-ID: <2024122712-CVE-2024-56627-f398@gregkh>
Date: Fri, 27 Dec 2024 15:51:34 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56627: ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read

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

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

ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read

An offset from client could be a negative value, It could lead
to an out-of-bounds read from the stream_buf.
Note that this issue is coming when setting
'vfs objects = streams_xattr parameter' in ksmbd.conf.

The Linux kernel CVE team has assigned CVE-2024-56627 to this issue.


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

	Fixed in 6.1.120 with commit de4d790dcf53be41736239d7ee63849a16ff5d10
	Fixed in 6.6.66 with commit 27de4295522e9a33e4a3fc72f7b8193df9eebe41
	Fixed in 6.12.5 with commit 81eed631935f2c52cdaf6691c6d48e0b06e8ad73
	Fixed in 6.13-rc2 with commit fc342cf86e2dc4d2edb0fc2ff5e28b6c7845adb9

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-2024-56627
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/smb/server/smb2pdu.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/de4d790dcf53be41736239d7ee63849a16ff5d10
	https://git.kernel.org/stable/c/27de4295522e9a33e4a3fc72f7b8193df9eebe41
	https://git.kernel.org/stable/c/81eed631935f2c52cdaf6691c6d48e0b06e8ad73
	https://git.kernel.org/stable/c/fc342cf86e2dc4d2edb0fc2ff5e28b6c7845adb9