High severity · published May 1, 2026
CVE-2026-43018
Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.17 before 6.1.168; 6.2 before 6.6.134; 6.7 before 6.12.81; 6.13 before 6.18.22; 6.19 before 6.19.12; 7.0; +5 more · source: NVD
LI
Linux · Linux
95118dd4edfec950898a00180c6f998df0a6406d before 59eecf0ffde15670e6a5e10c47be67f73d843b20; 95118dd4edfec950898a00180c6f998df0a6406d before 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81; 95118dd4edfec950898a00180c6f998df0a6406d before 7cadb03be37e761130edb153544fe0770a842b19; 95118dd4edfec950898a00180c6f998df0a6406d before 1d0bdbfe3e91c11f0a704c52443a9446a10d699c; 95118dd4edfec950898a00180c6f998df0a6406d before ea3cd36d7382d5f8309df04c275d20df139ed42c; 95118dd4edfec950898a00180c6f998df0a6406d before b255531b27da336571411248c2a72a350662bd09; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43018
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43018
Patch
https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c
Patch
https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20
Patch
https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81
Patch
https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19
Patch
https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09
Patch
https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c
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