HOMEVULNERABILITIESCVE-2026-43019
HIGH

CVE-2026-43019

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

7.8
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync

hci_conn lookup and field access must be covered by hdev lock in

set_cig_params_sync, otherwise it's possible it is freed concurrently.

Take hdev lock to prevent hci_conn from being deleted or modified

concurrently. Just RCU lock is not suitable here, as we also want to

avoid "tearing" in the configuration.

NVD Source

Technical Analysis

CVE-2026-43019 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 4 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
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Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02
PATCHhttps://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f
PATCHhttps://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c
PATCHhttps://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449

All References (4)

→
https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02Patch
→
https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9fPatch
→
https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2cPatch
→
https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449Patch

Quick Facts

CVE IDCVE-2026-43019
CVSS Score7.8 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 1, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43019 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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