PT-2026-37065 · Linux · Linux

Published 2026-05-05 · Updated 2026-05-05 · CVE-2026-43062

Mitre

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.

Related Identifiers

CVE-2026-43062

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-43062 · Security Note
• https://git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746d · Note
• https://git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19 · Note
• https://git.kernel.org/stable/c/3b94e62caa1dc1198d0d55d97bd710da1dee15d7 · Note
• https://git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529 · Note
• https://git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6 · Note
• https://git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82 · Note
• https://git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0 · Note
• https://git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186 · Note