CVE-2026-43134

EUVD-2026-27694
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 7%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
3.14 ≤
𝑥
< 5.10.252
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.202
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.165
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.128
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.75
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.16
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.6
linuxlinux_kernel
7.0:rc1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.170-3
fixed
bookworm (security)
6.1.174-1
fixed
bullseye
vulnerable
bullseye (security)
5.10.257-1
fixed
forky
7.0.12-2
fixed
sid
7.0.13-1
fixed
trixie
6.12.86-1
fixed
trixie (security)
6.12.94-1
fixed
Vulnerability Media Exposure
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