CVE-2026-43062

HIGH

Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()

Title source: cna
STIX 2.1

Description

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.

Scores

CVSS v3 7.1
EPSS 0.0003
EPSS Percentile 7.6%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Details

Status published
Products (18)
Linux/Linux < 5.7
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 111f74547eee8cfedfb854284e80f35c8a491186
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 15145675690cab2de1056e7ed68e59cbd0452529
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 21d3ba696918d6373233aac0b9d51fcabdedddc0
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 3b94e62caa1dc1198d0d55d97bd710da1dee15d7
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 5a1ea296f8589ce8f1e3141b2b123b34ad010e19
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - d90150c72d2e6a8a3079e88755dafcfbe91c746d
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - dd3b221e21079ade8263fbb7176f3d55ad75d3b6
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - f110b8f58b254bf997cec1bd60701b7798e9bb82
Linux/Linux 5.10.253 - 5.10.*
... and 8 more
Published May 05, 2026
Tracked Since May 05, 2026