HOMEVULNERABILITIESCVE-2026-43018
HIGH

CVE-2026-43018

Published: May 1, 2026· Updated: May 8, 2026

8.8
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:6.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-43018 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c
PATCHhttps://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20
PATCHhttps://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81
PATCHhttps://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19
PATCHhttps://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09
PATCHhttps://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c

All References (6)

→
https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699cPatch
→
https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20Patch
→
https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81Patch
→
https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19Patch
→
https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09Patch
→
https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42cPatch

Quick Facts

CVE IDCVE-2026-43018
CVSS Score8.8 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 1, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43018 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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