{"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": "2026-07-20T06:41:46.331Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T06:41:46.331Z"}, "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."}], "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": "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": "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": "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/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"}}}}

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