CVE-2024-44954: ALSA: line6: Fix racy access to midibuf
First published: Wed Sep 04 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <4.19.320 | |
| Linux Linux kernel | >4.20<5.4.282 | |
| Linux Linux kernel | >=5.5<5.10.224 | |
| Linux Linux kernel | >5.11<5.15.165 | |
| Linux Linux kernel | >=5.16<6.1.105 | |
| Linux Linux kernel | >=6.2<6.6.46 | |
| Linux Linux kernel | >=6.7<6.10.5 | |
| Linux Linux kernel | =6.11-rc1 | |
| Linux Linux kernel | =6.11-rc2 | |
| debian/linux | <=5.10.223-1 | 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/643293b68fbb6c03f5e907736498da17d43f0d81
- https://git.kernel.org/stable/c/40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5
- https://git.kernel.org/stable/c/e7e7d2b180d8f297cea6db43ea72402fd33e1a29
- https://git.kernel.org/stable/c/a54da4b787dcac60b598da69c9c0072812b8282d
- https://git.kernel.org/stable/c/c80f454a805443c274394b1db0d1ebf477abd94e
- https://git.kernel.org/stable/c/535df7f896a568a8a1564114eaea49d002cb1747
- https://git.kernel.org/stable/c/51d87f11dd199bbc6a85982b088ff27bde53b48a
- https://git.kernel.org/stable/c/15b7a03205b31bc5623378c190d22b7ff60026f1
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-44954
- https://nvd.nist.gov/vuln/detail/CVE-2024-44954
- https://launchpad.net/bugs/cve/CVE-2024-44954
- https://security-tracker.debian.org/tracker/CVE-2024-44954
- https://ubuntu.com/security/CVE-2024-44954
- https://git.kernel.org/linus/15b7a03205b31bc5623378c190d22b7ff60026f1
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