CVE-2026-43134
High
Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
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.
Exploit probability
0.2%
Published
May 6, 2026
Required by
Not available
Last source change
August 15, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2026-43134
View original source
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- 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
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43134.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-43134