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Back to active CVEs
High · CVSS 8.8CVE-2026-43018

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evtCVE-2026-43018

Answer in brief

CVE-2026-43018 records a High severity (CVSS 8.8) vulnerability in Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 1, 2026Updated Oct 16, 2026Source checked Oct 16, 2026First seen by HOL Oct 16, 2026Material review Oct 16, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=95118dd4edfec950898a00180c6f998df0a6406d <59eecf0ffde15670e6a5e10c47be67f73d843b20 || >=95118dd4edfec950898a00180c6f998df0a6406d <5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 || >=95118dd4edfec950898a00180c6f998df0a6406d <7cadb03be37e761130edb153544fe0770a842b19 || >=95118dd4edfec950898a00180c6f998df0a6406d <1d0bdbfe3e91c11f0a704c52443a9446a10d699c || >=95118dd4edfec950898a00180c6f998df0a6406d <ea3cd36d7382d5f8309df04c275d20df139ed42c || >=95118dd4edfec950898a00180c6f998df0a6406d <b255531b27da336571411248c2a72a350662bd0959eecf0ffde15670e6a5e10c47be67f73d843b20, 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81, 7cadb03be37e761130edb153544fe0770a842b19, 1d0bdbfe3e91c11f0a704c52443a9446a10d699c, ea3cd36d7382d5f8309df04c275d20df139ed42c, b255531b27da336571411248c2a72a350662bd09
Linux/Linuxgeneric5.17Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 59eecf0ffde15670e6a5e10c47be67f73d843b20 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 16, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 16, 2026
References
6 linked sources
Open source record