---
cve: "CVE-2024-44954"
severity: "HIGH"
cvss: 7.8
epss: "18%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-09-04 19:15:30"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T04:49:42+02:00"
---

# CVE-2024-44954

> 7.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 4.19.320
- Kernel ≥ 5.4.282
- Kernel ≥ 5.10.224
- Kernel ≥ 5.15.165
- Kernel ≥ 6.1.105
- Kernel ≥ 6.6.46
- Kernel ≥ 6.10.5

## Referenzen

- <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://lists.debian.org/debian-lts-announce/2024/10/msg00003.html>
- <https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-44954) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_