310 lines
16 KiB
JSON
310 lines
16 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-64015",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-07-19T07:54:57.027Z",
|
|
"datePublished": "2026-07-19T15:39:10.557Z",
|
|
"dateUpdated": "2026-10-30T12:27:27.767Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-10-30T12:27:27.767Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsecurity/keys: fix missed RCU read section on lookup\n\nNicholas Carlini reports that the keyring code calls assoc_array_find()\nin find_key_to_update() without holding the RCU read lock, while the\nassoc_array_gc() code really is designed around removing the node from\nthe tree and then freeing it after an RCU grace-period.\n\nThe regular key handling doesn't see this because holding the keyring\nsemaphore hides any lifetime issues, but the persistent key handling\nuses a different model.\n\nInstead of extending the keyring locking, just do the simple RCU locking\nthat the assoc_array was designed for."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 7.8,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The bug is reached only through find_key_to_update() on the persistent keyring register, which is invoked from keyctl_get_persistent() via the keyctl(2) syscall. There is no network, adjacent-radio, or physical-device path to this code.\nAC:L - Exploitation is a race between assoc_array_find() and assoc_array_gc() on the .persistent_register keyring; the attacker controls both sides by repeatedly calling KEYCTL_GET_PERSISTENT (including from multiple threads) while driving key expiry/GC via keyctl timeouts or natural garbage collection. Per kernel guidance, attacker-controlled races are AC:L.\nPR:L - Any unprivileged local user who can invoke keyctl() can call KEYCTL_GET_PERSISTENT for their own UID (-1) with a writable destination keyring (e.g., session keyring). No real-root or CAP_SETUID capability is required for the vulnerable lookup path; this remains PR:L even inside user namespaces.\nUI:N - Exploitation requires only the attacker's own keyctl syscalls and does not depend on any victim user action such as mounting a filesystem or opening a file.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel security domain; it does not cross a VM, container, or IOMMU boundary on its own.\nC:H - assoc_array_find() is documented to require an RCU read lock, but the persistent-keyring path called it without one while assoc_array_gc() frees tree nodes via call_rcu(), yielding a use-after-free on assoc_array nodes/leaves. UAF on kernel heap objects can be turned into arbitrary kernel memory reads.\nI:H - The freed assoc_array nodes can be reallocated and corrupted through concurrent GC versus lookup, providing a standard kernel heap UAF primitive that can be developed into arbitrary write or code-execution primitives.\nA:H - Dereferencing RCU-freed assoc_array tree nodes during lookup can cause kernel oops/panic from invalid pointer access, and UAF exploitation commonly destabilizes or crashes the kernel even when full exploitation is not attempted."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"security/keys/keyring.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "1d8d987a2aacde238ecd0f4946f28cef74c42b79",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "5036a9aa7f21fbce89a2a8451bbc177bae2e920d",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "4c5d407ba3ff7f30561ff73ba1b07ed70c864edc",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "cefa4265b11176c897a7d9e8e54d89e3701c5584",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "5659e6923cb72f8e18e8b539109ab512455fe195",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "50bb3435a5e627bfbdc52eb4536f49f88b3486b8",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "66288dcadf80974436250e9f70ed848836b835b5",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
|
|
"lessThan": "43a1e3744548e6fd85873e6fb43e293eb4010694",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"security/keys/keyring.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "3.13",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "3.13",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.273",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.224",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.175",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.142",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.92",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.34",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0.11",
|
|
"lessThanOrEqual": "7.0.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1",
|
|
"lessThanOrEqual": "*",
|
|
"status": "unaffected",
|
|
"versionType": "original_commit_for_fix"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"operator": "OR",
|
|
"negate": false,
|
|
"cpeMatch": [
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "5.10.273"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "5.15.224"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "6.1.175"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "6.6.142"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "6.12.92"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "6.18.34"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "7.0.11"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.13",
|
|
"versionEndExcluding": "7.1"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/1d8d987a2aacde238ecd0f4946f28cef74c42b79"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5036a9aa7f21fbce89a2a8451bbc177bae2e920d"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edc"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694"
|
|
}
|
|
],
|
|
"title": "security/keys: fix missed RCU read section on lookup",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-64015",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:35:17.736168Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-362",
|
|
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T20:28:08.372Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |