CVE-2024-44954

ALSA: line6: Fix racy access to midibuf

State: Published
Severity: 7.8 High
Published: Sep 4, 2024
Updated: Aug 5, 2026
Reserved: Aug 21, 2024

Description

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

ALSA: line6: Fix racy access to midibuf

There can be concurrent accesses to line6 midibuf from both the URB completion callback and the rawmidi API access. This could be a cause of KMSAN warning triggered by syzkaller below (so put as reported-by here).

This patch protects the midibuf call of the former code path with a spinlock for avoiding the possible races.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	705ececd1c60d0f5d6ef2a719008847883516970 to before 643293b68fbb6c03f5e907736498da17d43f0d81Affected 705ececd1c60d0f5d6ef2a719008847883516970 to before 40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5Affected 705ececd1c60d0f5d6ef2a719008847883516970 to before e7e7d2b180d8f297cea6db43ea72402fd33e1a29Affected 705ececd1c60d0f5d6ef2a719008847883516970 to before a54da4b787dcac60b598da69c9c0072812b8282dAffected 705ececd1c60d0f5d6ef2a719008847883516970 to before c80f454a805443c274394b1db0d1ebf477abd94eAffected 705ececd1c60d0f5d6ef2a719008847883516970 to before 535df7f896a568a8a1564114eaea49d002cb1747Affected 705ececd1c60d0f5d6ef2a719008847883516970 to before 51d87f11dd199bbc6a85982b088ff27bde53b48aAffected 705ececd1c60d0f5d6ef2a719008847883516970 to before 15b7a03205b31bc5623378c190d22b7ff60026f1Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 4.19.320 through 4.19.Not affected 5.4.282 through 5.4.Not affected 5.10.224 through 5.10.Not affected 5.15.165 through 5.15.Not affected 6.1.105 through 6.1.Not affected 6.6.46 through 6.6.Not affected 6.10.5 through 6.10.*Not affected 6.11 and laterNot affected

Product

Versions

LinuxLinux

705ececd1c60d0f5d6ef2a719008847883516970 to before 643293b68fbb6c03f5e907736498da17d43f0d81Affected
705ececd1c60d0f5d6ef2a719008847883516970 to before 40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5Affected
705ececd1c60d0f5d6ef2a719008847883516970 to before e7e7d2b180d8f297cea6db43ea72402fd33e1a29Affected
705ececd1c60d0f5d6ef2a719008847883516970 to before a54da4b787dcac60b598da69c9c0072812b8282dAffected
705ececd1c60d0f5d6ef2a719008847883516970 to before c80f454a805443c274394b1db0d1ebf477abd94eAffected
705ececd1c60d0f5d6ef2a719008847883516970 to before 535df7f896a568a8a1564114eaea49d002cb1747Affected
705ececd1c60d0f5d6ef2a719008847883516970 to before 51d87f11dd199bbc6a85982b088ff27bde53b48aAffected
705ececd1c60d0f5d6ef2a719008847883516970 to before 15b7a03205b31bc5623378c190d22b7ff60026f1Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
4.19.320 through 4.19.*Not affected
5.4.282 through 5.4.*Not affected
5.10.224 through 5.10.*Not affected
5.15.165 through 5.15.*Not affected
6.1.105 through 6.1.*Not affected
6.6.46 through 6.6.*Not affected
6.10.5 through 6.10.*Not affected
6.11 and laterNot affected

References

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