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

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


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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

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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.