FKIE_CVE-2026-80572
Vulnerability from fkie_nvd - Published: 2026-08-26 15:17 - Updated: 2026-10-30 13:20
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: byd - synchronize timer deletion before freeing private data
byd_disconnect() uses timer_delete() before freeing the driver's private
data. This does not wait for a running byd_clear_touch() callback, which
dereferences the private data and its psmouse pointer. A callback racing
with disconnect can therefore access the private data after it has been
freed. The timer can also still be re-armed by byd_process_byte() while
the disconnect is in progress.
Use timer_shutdown_sync() before freeing the private data: it waits for
a running callback and turns any later re-arm attempt into a no-op.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/input/mouse/byd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "fe2785d5513b3254368a1f0831515fc59ab0d40d",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "b4d74810aad9b29c313b4d7880c84aceb5abe488",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "84b205297fa15f97510342221d8c9a0119711478",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "28d984a66b9e14be74986167b6ad40b5e0daf19a",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "ee944a706a18322b4a2599eebe8040a2994e928f",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "8dbfd8e32a13e116790780ed0be82b5a05eb9916",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "2e509ef60ee41a2da0deb062c262bb530143fb37",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
},
{
"lessThan": "c83e79c0842ed29860648bcce5022ef0ba5001c6",
"status": "affected",
"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/input/mouse/byd.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.6"
},
{
"lessThan": "4.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.273",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.224",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.154",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.106",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: byd - synchronize timer deletion before freeing private data\n\nbyd_disconnect() uses timer_delete() before freeing the driver\u0027s private\ndata. This does not wait for a running byd_clear_touch() callback, which\ndereferences the private data and its psmouse pointer. A callback racing\nwith disconnect can therefore access the private data after it has been\nfreed. The timer can also still be re-armed by byd_process_byte() while\nthe disconnect is in progress.\n\nUse timer_shutdown_sync() before freeing the private data: it waits for\na running callback and turns any later re-arm attempt into a no-op."
}
],
"id": "CVE-2026-80572",
"lastModified": "2026-10-30T13:20:07.047",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-80572",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T19:17:35.214904Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-26T15:17:13.140",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/28d984a66b9e14be74986167b6ad40b5e0daf19a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2e509ef60ee41a2da0deb062c262bb530143fb37"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/84b205297fa15f97510342221d8c9a0119711478"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8dbfd8e32a13e116790780ed0be82b5a05eb9916"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b4d74810aad9b29c313b4d7880c84aceb5abe488"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c83e79c0842ed29860648bcce5022ef0ba5001c6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ee944a706a18322b4a2599eebe8040a2994e928f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fe2785d5513b3254368a1f0831515fc59ab0d40d"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Sightings
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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