{"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": "2026-07-20T13:42:22.981Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:42:22.981Z"}, "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"}}], "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": 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"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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{"bugzilla": {"description": "kernel: security/keys: fix missed RCU read section on lookup", "id": "2502380", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502380"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsecurity/keys: fix missed RCU read section on lookup\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.\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.\nInstead of extending the keyring locking, just do the simple RCU locking\nthat the assoc_array was designed for.", "A flaw was found in the Linux kernel's keyring code. The `assoc_array_find()` function, used for looking up keys, was called without holding the necessary Read-Copy-Update (RCU) read lock. This oversight allows for a memory corruption vulnerability, particularly affecting persistent key handling, as the system's garbage collection mechanism can free memory while it is still in use. This could lead to a denial of service."], "name": "CVE-2026-64015", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64015\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64015\nhttps://lore.kernel.org/linux-cve-announce/2026071957-CVE-2026-64015-19c9@gregkh/T"], "threat_severity": "Moderate"}

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