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Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-43134

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-43134

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "335071c0c3637064ec250481f589075db44fe4e6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "fa6ad76fa8623c0a50d529cd5726fa5d819a3be4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "9118601ff90b79e8df3c0c98f48ae00c1b02ecef",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "481ea39b342c347b6ac029f3d418486280be4e45",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "ec91078e132179b04e0c3906b599816c056ceaad",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "96581749c7c14fbec32c35728520867929600041",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "8dd43f9a9323f9c01bc8246da8d81a4c783c9e97",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d",
        "lessThan": "138d7eca445ef37a0333425d269ee59900ca1104",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/bluetooth/l2cap_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.252",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.202",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.165",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.128",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.75",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.16",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.6",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/l2cap_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-43134

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40033 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement