HighFix available
Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.252, 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128
- CVEs
- CVE-2026-43134
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 21:16 UTC · Revision 1
Source evidence
Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ
core-osv · Original sourcePublished 6 May 2026, 11:27 UTC
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.
osv:CVE-2026-43134
Kernel
Fixed versions: 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6
Complete source record
{
"id": "196b304f6c14c8f87e53f503d72e8e8e69be010602ef5da404e897573722b2cd",
"url": "https://osv.dev/vulnerability/CVE-2026-43134",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ",
"summary": "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.",
"evidence": "osv:CVE-2026-43134",
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"value": "5.10.252",
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"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
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"events": [
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{
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"package": {
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"ecosystem": "Linux"
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"database_specific": {
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"modified": "2026-10-28T02:30:23.489000811Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97",
"https://git.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecef",
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"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",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43134.json"
}
},
"related_cves": [
{
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"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490145,
"published_at": "2026-05-06T11:27:21.541+00:00"
}