HighFix available
ALSA: line6: Fix racy access to midibuf
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.19.320, 5.10.224, 5.15.165, 5.4.282, 6.1.105, 6.10.5, 6.6.46
- CVEs
- CVE-2024-44954
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 23:15 UTC · Revision 1
Source evidence
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.
osv:CVE-2024-44954
Kernel
Fixed versions: 4.19.320, 5.4.282, 5.10.224, 5.15.165, 6.1.105, 6.6.46, 6.10.5
Complete source record
{
"id": "22b87cce69a23696849f60a6c9c55bf0e51511a7bcc39ea9b999ec243fd59e7c",
"url": "https://osv.dev/vulnerability/CVE-2024-44954",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALSA: line6: Fix racy access to midibuf",
"summary": "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.",
"evidence": "osv:CVE-2024-44954",
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{
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"severity": "high",
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"aliases": [
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
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"affected": [
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"package": {
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"modified": "2026-10-28T02:30:40.364617463Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/15b7a03205b31bc5623378c190d22b7ff60026f1",
"https://git.kernel.org/stable/c/40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5",
"https://git.kernel.org/stable/c/51d87f11dd199bbc6a85982b088ff27bde53b48a",
"https://git.kernel.org/stable/c/535df7f896a568a8a1564114eaea49d002cb1747",
"https://git.kernel.org/stable/c/643293b68fbb6c03f5e907736498da17d43f0d81",
"https://git.kernel.org/stable/c/a54da4b787dcac60b598da69c9c0072812b8282d",
"https://git.kernel.org/stable/c/c80f454a805443c274394b1db0d1ebf477abd94e",
"https://git.kernel.org/stable/c/e7e7d2b180d8f297cea6db43ea72402fd33e1a29",
"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html",
"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44954.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-44954",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44954.json"
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},
"related_cves": [
{
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 507850,
"published_at": "2024-09-04T18:35:53.73+00:00"
}