CVE-2026-64343 (GCVE-0-2026-64343)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
EPSS
VEX
Title
USB: ldusb: fix use-after-free on disconnect race
Summary
In the Linux kernel, the following vulnerability has been resolved:
USB: ldusb: fix use-after-free on disconnect race
mutex_unlock() may access the mutex structure after releasing the lock
and therefore cannot be used to manage lifetime of objects directly
(unlike spinlocks and refcounts). [1][2]
Use a kref to release the driver data to avoid use-after-free in
mutex_unlock() when release() races with disconnect().
[1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is
non-atomic")
[2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most
other sleeping locks, can still use the lock object
after it's unlocked")
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ce0d7d3f575fc1ba6a89c3c651e710355590daff , < fc55923a972e715f9a27187b47d4920709e23d85
(git)
Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69 (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < af59829e67e11ba2511a9f8e4b9111afc7d1f550 (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < 02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4 (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < d8f69404e1d671326f86d378b9f5bfbd56490e9d (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < 2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915 (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < a3e794136ab5e3ad1e7019175a4b837aec86db4b (git) Affected: ce0d7d3f575fc1ba6a89c3c651e710355590daff , < 19bdfc7b3c179331eafa423d87e1336f43bbfeb8 (git) |
|
| Linux | Linux |
Affected:
2.6.26
Unaffected: 0 , < 2.6.26 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/ldusb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "fc55923a972e715f9a27187b47d4920709e23d85",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "af59829e67e11ba2511a9f8e4b9111afc7d1f550",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "d8f69404e1d671326f86d378b9f5bfbd56490e9d",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "a3e794136ab5e3ad1e7019175a4b837aec86db4b",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
},
{
"lessThan": "19bdfc7b3c179331eafa423d87e1336f43bbfeb8",
"status": "affected",
"version": "ce0d7d3f575fc1ba6a89c3c651e710355590daff",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/ldusb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.26"
},
{
"lessThan": "2.6.26",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2-rc3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.96",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.39",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "2.6.26",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2-rc3",
"versionStartIncluding": "2.6.26",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: ldusb: fix use-after-free on disconnect race\n\nmutex_unlock() may access the mutex structure after releasing the lock\nand therefore cannot be used to manage lifetime of objects directly\n(unlike spinlocks and refcounts). [1][2]\n\nUse a kref to release the driver data to avoid use-after-free in\nmutex_unlock() when release() races with disconnect().\n\n[1] a51749ab34d9 (\"locking/mutex: Document that mutex_unlock() is\n non-atomic\")\n[2] 2b9d9e0a9ba0 (\"locking/mutex: Clarify that mutex_unlock(), and most\n other sleeping locks, can still use the lock object\n after it\u0027s unlocked\")"
}
],
"providerMetadata": {
"dateUpdated": "2026-07-25T08:50:05.828Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85"
},
{
"url": "https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69"
},
{
"url": "https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550"
},
{
"url": "https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4"
},
{
"url": "https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d"
},
{
"url": "https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915"
},
{
"url": "https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b"
},
{
"url": "https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8"
}
],
"title": "USB: ldusb: fix use-after-free on disconnect race",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64343",
"datePublished": "2026-07-25T08:50:05.828Z",
"dateReserved": "2026-07-19T15:36:31.781Z",
"dateUpdated": "2026-07-25T08:50:05.828Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64343",
"date": "2026-07-26",
"epss": "0.00177",
"percentile": "0.07456"
},
"microsoft_vex": {
"current_release_date": "2026-07-26T01:06:39.000Z",
"cve": "CVE-2026-64343",
"id": "msrc_CVE-2026-64343",
"initial_release_date": "2026-07-26T01:06:39.000Z",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "USB: ldusb: fix use-after-free on disconnect race",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64343.json",
"version": "1"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-64343\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:16.353\",\"lastModified\":\"2026-07-25T10:17:16.353\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nUSB: ldusb: fix use-after-free on disconnect race\\n\\nmutex_unlock() may access the mutex structure after releasing the lock\\nand therefore cannot be used to manage lifetime of objects directly\\n(unlike spinlocks and refcounts). [1][2]\\n\\nUse a kref to release the driver data to avoid use-after-free in\\nmutex_unlock() when release() races with disconnect().\\n\\n[1] a51749ab34d9 (\\\"locking/mutex: Document that mutex_unlock() is\\n non-atomic\\\")\\n[2] 2b9d9e0a9ba0 (\\\"locking/mutex: Clarify that mutex_unlock(), and most\\n other sleeping locks, can still use the lock object\\n after it\u0027s unlocked\\\")\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/misc/ldusb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"fc55923a972e715f9a27187b47d4920709e23d85\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"af59829e67e11ba2511a9f8e4b9111afc7d1f550\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"d8f69404e1d671326f86d378b9f5bfbd56490e9d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"a3e794136ab5e3ad1e7019175a4b837aec86db4b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ce0d7d3f575fc1ba6a89c3c651e710355590daff\",\"lessThan\":\"19bdfc7b3c179331eafa423d87e1336f43bbfeb8\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/misc/ldusb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.26\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.26\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T16:01:23Z",
"cve": "CVE-2026-64343",
"id": "CVE-2026-64343",
"initial_release_date": "2026-07-25T16:01:23Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64343",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64343.json",
"version": "2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
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
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…