HOMEVULNERABILITIESCVE-2026-43134
HIGH

CVE-2026-43134

Published: May 6, 2026· Updated: May 12, 2026

8.1
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.7th

Official Description

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

Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ

This adds a check for encryption key size upon receiving

L2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which

expects L2CAP_CR_LE_BAD_KEY_SIZE.

NVD Source

Technical Analysis

CVE-2026-43134 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), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

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

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/138d7eca445ef37a0333425d269ee59900ca1104
PATCHhttps://git.kernel.org/stable/c/335071c0c3637064ec250481f589075db44fe4e6
PATCHhttps://git.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45
PATCHhttps://git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97
PATCHhttps://git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecef
PATCHhttps://git.kernel.org/stable/c/96581749c7c14fbec32c35728520867929600041
PATCHhttps://git.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaad
PATCHhttps://git.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4

All References (8)

→
https://git.kernel.org/stable/c/138d7eca445ef37a0333425d269ee59900ca1104Patch
→
https://git.kernel.org/stable/c/335071c0c3637064ec250481f589075db44fe4e6Patch
→
https://git.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45Patch
→
https://git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97Patch
→
https://git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecefPatch
→
https://git.kernel.org/stable/c/96581749c7c14fbec32c35728520867929600041Patch
→
https://git.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaadPatch
→
https://git.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4Patch

Quick Facts

CVE IDCVE-2026-43134
CVSS Score8.1 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43134 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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