CVE-2026-46056

Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

At a glance

Severity
HIGH 8.8
EPSS
EPSS 0.28 % · percentile 21 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 92a25256f142d55e25f9959441cea6ddeabae57e < ea18732d2614557e59f4c0d8cdbe6611aeab33b7 ; affected 92a25256f142d55e25f9959441cea6ddeabae57e < d28311539ac9f65e29308ea219ecaa48aa5e76e5 ; affected 92a25256f142d55e25f9959441cea6ddeabae57e < b6ae482f88654db407c8c17619d4b62959b903ef ; affected 92a25256f142d55e25f9959441cea6ddeabae57e < 204028af77a265e31ceb4ba7f643349a3cca72b2 ; affected 92a25256f142d55e25f9959441cea6ddeabae57e < 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 ; affected 92a25256f142d55e25f9959441cea6ddeabae57e < e08d75753db17aa943d7622f09d9c217b5bfd3b8
Linux · Linuxaffected 3.7 ; unaffected 0 < 3.7 ; unaffected 5.10.259 ≤ 5.10.* ; unaffected 5.15.210 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.*

References

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