CVE-2026-43018

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

HIGH
8.8
CVSS Score
Published: May 1, 2026 at 02:15 PM UTC
Updated: October 19, 2026 at 08:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.17 ≤ v < 6.1.1686.13 ≤ v < 6.18.226.19 ≤ v < 6.19.126.2 ≤ v < 6.6.1346.7 ≤ v < 6.12.815.177.07.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc695118dd4edfec950898a00180c6f998df0a6406d
Vendor states this is fixed in 1d0bdbfe3e91c11f0a704c52443a9446a10d699c (fixed)
Vendor states this is fixed in 59eecf0ffde15670e6a5e10c47be67f73d843b20 (fixed)
Vendor states this is fixed in 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 (fixed)
Vendor states this is fixed in 7cadb03be37e761130edb153544fe0770a842b19 (fixed)
Vendor states this is fixed in b255531b27da336571411248c2a72a350662bd09 (fixed)
Vendor states this is fixed in ea3cd36d7382d5f8309df04c275d20df139ed42c (fixed)
Vendor states this is fixed in 5.17 (unaffected)
Vendor states this is fixed in 6.1.168 (unaffected)
Vendor states this is fixed in 6.12.81 (unaffected)
Vendor states this is fixed in 6.18.22 (unaffected)
Vendor states this is fixed in 6.19.12 (unaffected)
Vendor states this is fixed in 6.6.134 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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