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Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp() l2cap_ecred_reconf_rsp() casts the incoming data to struct l2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with result at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes with result at offset 0). This causes two problems: - The sizeof(*rsp) length check requires 8 bytes instead of the correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected with -EPROTO. - rsp->result reads from offset 6 instead of offset 0, returning wrong data when the packet is large enough to pass the check. Fix by using the correct type. Also pass the already byte-swapped result variable to BT_DBG instead of the raw __le16 field.

Announced Source revision 1
Original source ↗

CVE-2026-43062

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-2026-43062

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": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "21d3ba696918d6373233aac0b9d51fcabdedddc0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "3b94e62caa1dc1198d0d55d97bd710da1dee15d7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "111f74547eee8cfedfb854284e80f35c8a491186",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "dd3b221e21079ade8263fbb7176f3d55ad75d3b6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "d90150c72d2e6a8a3079e88755dafcfbe91c746d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "5a1ea296f8589ce8f1e3141b2b123b34ad010e19",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "f110b8f58b254bf997cec1bd60701b7798e9bb82",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "15145675690cab2de1056e7ed68e59cbd0452529",
        "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": "5.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.167",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.130",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.78",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.20",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.10",
        "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-2026-43062

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40014 · Revision 1
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Publisher date
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