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Vulnerability record · CVE-2026-43062 · published 5 May 2026

CVE-2026-43062: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.1 CVSS 3.1 High EPSS 0.35% · top 74.5%
7.1CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186 Patch
https://git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529 Patch
https://git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0 Patch
https://git.kernel.org/stable/c/3b94e62caa1dc1198d0d55d97bd710da1dee15d7 Patch
https://git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19 Patch
https://git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746d Patch
https://git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6 Patch
https://git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43062), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.