CVE-2026-43062

Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()

HIGH
7.1
CVSS Score
Published: May 5, 2026 at 03:17 PM UTC
Updated: October 19, 2026 at 08:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.11 ≤ v < 5.15.2035.16 ≤ v < 6.1.1675.7 ≤ v < 5.10.2536.13 ≤ v < 6.18.206.19 ≤ v < 6.19.106.2 ≤ v < 6.6.1306.7 ≤ v < 6.12.7815f02b91056253e8cdc592888f431da0731337b85.77.07.0 rc17.0 rc27.0 rc37.0 rc4
Vendor states this is fixed in 111f74547eee8cfedfb854284e80f35c8a491186 (fixed)
Vendor states this is fixed in 15145675690cab2de1056e7ed68e59cbd0452529 (fixed)
Vendor states this is fixed in 21d3ba696918d6373233aac0b9d51fcabdedddc0 (fixed)
Vendor states this is fixed in 3b94e62caa1dc1198d0d55d97bd710da1dee15d7 (fixed)
Vendor states this is fixed in 5a1ea296f8589ce8f1e3141b2b123b34ad010e19 (fixed)
Vendor states this is fixed in d90150c72d2e6a8a3079e88755dafcfbe91c746d (fixed)
Vendor states this is fixed in dd3b221e21079ade8263fbb7176f3d55ad75d3b6 (fixed)
Vendor states this is fixed in f110b8f58b254bf997cec1bd60701b7798e9bb82 (fixed)
Vendor states this is fixed in 5.10.253 (unaffected)
Vendor states this is fixed in 5.15.203 (unaffected)
Vendor states this is fixed in 5.7 (unaffected)
Vendor states this is fixed in 6.1.167 (unaffected)
Vendor states this is fixed in 6.12.78 (unaffected)
Vendor states this is fixed in 6.18.20 (unaffected)
Vendor states this is fixed in 6.19.10 (unaffected)
Vendor states this is fixed in 6.6.130 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-843

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