Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt
Summary
| CVE | CVE-2026-43018 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-01 15:16:45 UTC |
| Updated | 2026-05-03 07:16:22 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.000240000 probability, percentile 0.068220000 (date 2026-05-02)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 8.8 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d 59eecf0ffde15670e6a5e10c47be67f73d843b20 git | Not specified |
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 git | Not specified |
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d 7cadb03be37e761130edb153544fe0770a842b19 git | Not specified |
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d 1d0bdbfe3e91c11f0a704c52443a9446a10d699c git | Not specified |
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d ea3cd36d7382d5f8309df04c275d20df139ed42c git | Not specified |
| CNA | Linux | Linux | affected 95118dd4edfec950898a00180c6f998df0a6406d b255531b27da336571411248c2a72a350662bd09 git | Not specified |
| CNA | Linux | Linux | affected 5.17 | Not specified |
| CNA | Linux | Linux | unaffected 5.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.168 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.134 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.81 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.22 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.12 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.