linux-cve-announce - CVE-2022-50719: ALSA: line6: fix stack overflow in line6_midi

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Message-ID: <2025122416-CVE-2022-50719-02d8@gregkh>
Date: Wed, 24 Dec 2025 13:26:18 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50719: ALSA: line6: fix stack overflow in line6_midi_transmit

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

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

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

ALSA: line6: fix stack overflow in line6_midi_transmit

Correctly calculate available space including the size of the chunk
buffer. This fixes a buffer overflow when multiple MIDI sysex
messages are sent to a PODxt device.

The Linux kernel CVE team has assigned CVE-2022-50719 to this issue.


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

	Fixed in 4.9.337 with commit b026af92b2cea907c780f7168c730c816cd33311
	Fixed in 4.14.303 with commit 49cb7737e733013ec86aa77ed2e19b94a68eaa05
	Fixed in 4.19.270 with commit 0c76087449ee4ed45a88b10017d02c6694caedb1
	Fixed in 5.4.229 with commit 25e8c6ecb46843a955f254b8f0d77894e4a53dc4
	Fixed in 5.10.163 with commit 66f359ad66d49f75d39ac729f9114dabf90b81bb
	Fixed in 5.15.87 with commit 0c9118e381ff538874e00fd4e66a768273c150fb
	Fixed in 6.0.17 with commit 61e4be4a60cc6de723f8c574ddbcb3025eb44cac
	Fixed in 6.1.3 with commit 389d34c2a8b52acc351fd932ed4bea41fee5a39b
	Fixed in 6.2 with commit b8800d324abb50160560c636bfafe2c81001b66c

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-2022-50719
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/usb/line6/midi.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/b026af92b2cea907c780f7168c730c816cd33311
	https://git.kernel.org/stable/c/49cb7737e733013ec86aa77ed2e19b94a68eaa05
	https://git.kernel.org/stable/c/0c76087449ee4ed45a88b10017d02c6694caedb1
	https://git.kernel.org/stable/c/25e8c6ecb46843a955f254b8f0d77894e4a53dc4
	https://git.kernel.org/stable/c/66f359ad66d49f75d39ac729f9114dabf90b81bb
	https://git.kernel.org/stable/c/0c9118e381ff538874e00fd4e66a768273c150fb
	https://git.kernel.org/stable/c/61e4be4a60cc6de723f8c574ddbcb3025eb44cac
	https://git.kernel.org/stable/c/389d34c2a8b52acc351fd932ed4bea41fee5a39b
	https://git.kernel.org/stable/c/b8800d324abb50160560c636bfafe2c81001b66c