CVE-2026-43134

Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ

CVSS 8.1 HIGHEPSS 0.2%

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

06 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Linux · Linux

References

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