In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix...

CVE-2026-46056 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

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.

Basic information

Type
unreviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
—
Source code
Not specified
Published (advisory)
2026-05-27 15:33:22 UTC
Updated
2026-06-19 15:34:16 UTC
NVD published
2026-05-27

EPSS Score

Score Percentile
0.27% 17.71%

CVSS Scores

Base score Version Severity Vector
8.8 3.1 —
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-v6c2-56h6-9pgq ↗
CVE CVE-2026-46056 ↗

CWEs

CWE id Name
CWE-416 Use After Free

References

cvelogic Threat Intelligence