Vulnerability-Lookup

GHSA-6MF2-XQWV-JHQ3

Vulnerability from github – Published: 2026-05-05 18:33 – Updated: 2026-05-08 15:31

Details

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.

Severity ?

7.1 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43062"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-05T16:16:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()\n\nl2cap_ecred_reconf_rsp() casts the incoming data to struct\nl2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with\nresult at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes\nwith result at offset 0).\n\nThis causes two problems:\n\n - The sizeof(*rsp) length check requires 8 bytes instead of the\n   correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected\n   with -EPROTO.\n\n - rsp-\u003eresult reads from offset 6 instead of offset 0, returning\n   wrong data when the packet is large enough to pass the check.\n\nFix by using the correct type.  Also pass the already byte-swapped\nresult variable to BT_DBG instead of the raw __le16 field.",
  "id": "GHSA-6mf2-xqwv-jhq3",
  "modified": "2026-05-08T15:31:15Z",
  "published": "2026-05-05T18:33:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43062"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b94e62caa1dc1198d0d55d97bd710da1dee15d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43062 (GCVE-0-2026-43062)

Vulnerability from cvelistv5 – Published: 2026-05-05 15:17 – Updated: 2026-05-11 22:16

Title

Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()

Summary

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.

Severity ?

7.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/21d3ba696918d6373…
https://git.kernel.org/stable/c/3b94e62caa1dc1198…
https://git.kernel.org/stable/c/111f74547eee8cfed…
https://git.kernel.org/stable/c/dd3b221e21079ade8…
https://git.kernel.org/stable/c/d90150c72d2e6a8a3…
https://git.kernel.org/stable/c/5a1ea296f8589ce8f…
https://git.kernel.org/stable/c/f110b8f58b254bf99…
https://git.kernel.org/stable/c/15145675690cab2de…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 21d3ba696918d6373233aac0b9d51fcabdedddc0 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 3b94e62caa1dc1198d0d55d97bd710da1dee15d7 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 111f74547eee8cfedfb854284e80f35c8a491186 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < dd3b221e21079ade8263fbb7176f3d55ad75d3b6 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < d90150c72d2e6a8a3079e88755dafcfbe91c746d (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 5a1ea296f8589ce8f1e3141b2b123b34ad010e19 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < f110b8f58b254bf997cec1bd60701b7798e9bb82 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 15145675690cab2de1056e7ed68e59cbd0452529 (git)
Linux	Linux	Affected: 5.7 Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "21d3ba696918d6373233aac0b9d51fcabdedddc0",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "3b94e62caa1dc1198d0d55d97bd710da1dee15d7",
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              "version": "15f02b91056253e8cdc592888f431da0731337b8",
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            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "versionType": "git"
            },
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            },
            {
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            }
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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            {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                {
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                },
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()\n\nl2cap_ecred_reconf_rsp() casts the incoming data to struct\nl2cap_ecred_conn_rsp (the ECRED *connection* response, 8 bytes with\nresult at offset 6) instead of struct l2cap_ecred_reconf_rsp (2 bytes\nwith result at offset 0).\n\nThis causes two problems:\n\n - The sizeof(*rsp) length check requires 8 bytes instead of the\n   correct 2, so valid L2CAP_ECRED_RECONF_RSP packets are rejected\n   with -EPROTO.\n\n - rsp-\u003eresult reads from offset 6 instead of offset 0, returning\n   wrong data when the packet is large enough to pass the check.\n\nFix by using the correct type.  Also pass the already byte-swapped\nresult variable to BT_DBG instead of the raw __le16 field."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
            "version": "3.1"
          }
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:16:58.662Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0"
        },
        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19"
        },
        {
          "url": "https://git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82"
        },
        {
          "url": "https://git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529"
        }
      ],
      "title": "Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43062",
    "datePublished": "2026-05-05T15:17:27.830Z",
    "dateReserved": "2026-05-01T14:12:55.981Z",
    "dateUpdated": "2026-05-11T22:16:58.662Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-6MF2-XQWV-JHQ3

CVE-2026-43062 (GCVE-0-2026-43062)

Tags

Sightings

Nomenclature