CVE-2026-43018 Details
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.
A use-after-free vulnerability has been addressed in the Linux kernel's Bluetooth subsystem. The issue arises in the handling of connection parameter requests for low-energy (LE) remote devices. Specifically, the vulnerability occurs because the lookup of connection handles and subsequent field accesses are not properly synchronized with the device lock, allowing for the possibility that the connection data could be freed while still in use. This vulnerability affects the Linux kernel stable group.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c | kernel.org | Patch |
| https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.17, < 6.1.168 >= 6.2, < 6.6.134 >= 6.7, < 6.12.81 >= 6.13, < 6.18.22 >= 6.19, < 6.19.12 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 3, 2026 | CVE Modified | kernel.org |
| May 1, 2026 | New CVE Received | kernel.org |