CVE-2026-64015

security/keys: fix missed RCU read section on lookup

HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.15 % · percentile 5 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: security/keys: fix missed RCU read section on lookup Nicholas Carlini reports that the keyring code calls assoc_array_find() in find_key_to_update() without holding the RCU read lock, while the assoc_array_gc() code really is designed around removing the node from the tree and then freeing it after an RCU grace-period. The regular key handling doesn't see this because holding the keyring semaphore hides any lifetime issues, but the persistent key handling uses a different model. Instead of extending the keyring locking, just do the simple RCU locking that the assoc_array was designed for.

Weaknesses (CWE)

  • CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization
  • CWE-125 — Out-of-bounds Read

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < 4c5d407ba3ff7f30561ff73ba1b07ed70c864edc ; affected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < cefa4265b11176c897a7d9e8e54d89e3701c5584 ; affected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < 5659e6923cb72f8e18e8b539109ab512455fe195 ; affected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < 50bb3435a5e627bfbdc52eb4536f49f88b3486b8 ; affected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < 66288dcadf80974436250e9f70ed848836b835b5 ; affected b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 < 43a1e3744548e6fd85873e6fb43e293eb4010694
Linux · Linuxaffected 3.13 ; unaffected 0 < 3.13 ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.142 ≤ 6.6.* ; unaffected 6.12.92 ≤ 6.12.* ; unaffected 6.18.34 ≤ 6.18.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD