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

Vulnerability from cvelistv5 – Published: 2026-05-05 15:17 – Updated: 2026-08-05 12:25
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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)
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Also pass the already byte-swapped\\nresult variable to BT_DBG instead of the raw __le16 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-02T12:49:41+00:00",
      "cve": "CVE-2026-43062",
      "id": "CVE-2026-43062",
      "initial_release_date": "2026-05-05T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43062.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T17:10:33Z",
      "cve": "CVE-2026-43062",
      "id": "CVE-2026-43062",
      "initial_release_date": "2026-05-06T01:40:41Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "554",
      "product_status:known_not_affected": "164",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43062",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43062.json",
      "version": "9"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.