linux-cve-announce - CVE-2024-57893: ALSA: seq: oss: Fix races at processing SysEx messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2025011513-CVE-2024-57893-b263@gregkh>
Date: Wed, 15 Jan 2025 14:06:16 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-57893: ALSA: seq: oss: Fix races at processing SysEx messages

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

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

ALSA: seq: oss: Fix races at processing SysEx messages

OSS sequencer handles the SysEx messages split in 6 bytes packets, and
ALSA sequencer OSS layer tries to combine those.  It stores the data
in the internal buffer and this access is racy as of now, which may
lead to the out-of-bounds access.

As a temporary band-aid fix, introduce a mutex for serializing the
process of the SysEx message packets.

The Linux kernel CVE team has assigned CVE-2024-57893 to this issue.


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

	Fixed in 6.1.124 with commit cff1de87ed14fc0f2332213d2367100e7ad0753a
	Fixed in 6.6.70 with commit d2392b79d8af3714ea8878b71c66dc49d3110f44
	Fixed in 6.12.9 with commit 9d382112b36382aa65aad765f189ebde9926c101
	Fixed in 6.13-rc6 with commit 0179488ca992d79908b8e26b9213f1554fc5bacc

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-2024-57893
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:
	sound/core/seq/oss/seq_oss_synth.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/cff1de87ed14fc0f2332213d2367100e7ad0753a
	https://git.kernel.org/stable/c/d2392b79d8af3714ea8878b71c66dc49d3110f44
	https://git.kernel.org/stable/c/9d382112b36382aa65aad765f189ebde9926c101
	https://git.kernel.org/stable/c/0179488ca992d79908b8e26b9213f1554fc5bacc