{"id":"CVE-2026-64015","title":"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 th…","summary":"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 th…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.13, < 6.1.175","linux_kernel >= 6.2, < 6.6.142","linux_kernel >= 6.7, < 6.12.92","linux_kernel >= 6.13, < 6.18.34","linux_kernel >= 6.19, < 7.0.11","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.11"],"published":"2026-07-19","updated":"2026-10-08","sourceUpdated":"2026-10-08T17:09:49.653","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64015","references":[{"url":"https://git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.002,"epssPercentile":0.09034,"ingestedAt":"2026-10-08T17:56:11.698Z","slug":"CVE-2026-64015","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 3.13, < 6.1.175`\n- `linux_kernel >= 6.2, < 6.6.142`\n- `linux_kernel >= 6.7, < 6.12.92`\n- `linux_kernel >= 6.13, < 6.18.34`\n- `linux_kernel >= 6.19, < 7.0.11`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.11`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}