High severity8.1NVD Advisory· Published May 6, 2026· Updated May 12, 2026

CVE-2026-43134

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernel3 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.14,<5.10.252
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- (no CPE)

Patches

Vulnerability mechanics

References

git.kernel.org/stable/c/138d7eca445ef37a0333425d269ee59900ca1104nvdPatch
git.kernel.org/stable/c/335071c0c3637064ec250481f589075db44fe4e6nvdPatch
git.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45nvdPatch
git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97nvdPatch
git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecefnvdPatch
git.kernel.org/stable/c/96581749c7c14fbec32c35728520867929600041nvdPatch
git.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaadnvdPatch
git.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4nvdPatch

News mentions

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cvss	0.526
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000