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 0.0022
EPSS Percentile 11.9%
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 (27)
linux/Kernel 5.11.0 - 5.15.203linux
linux/Kernel 5.16.0 - 6.1.167linux
linux/Kernel 5.7.0 - 5.10.253linux
linux/Kernel 6.13.0 - 6.18.20linux
linux/Kernel 6.19.0 - 6.19.10linux
linux/Kernel 6.2.0 - 6.6.130linux
linux/Kernel 6.7.0 - 6.12.78linux
Linux/Linux < 5.7
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 111f74547eee8cfedfb854284e80f35c8a491186
Linux/Linux 15f02b91056253e8cdc592888f431da0731337b8 - 15145675690cab2de1056e7ed68e59cbd0452529
... and 17 more
Published May 05, 2026
Tracked Since May 05, 2026