CVE-2026-43062Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 15f02b91056253e8cdc592888f431da0731337b8 before 21d3ba696918d6373233aac0b9d51fcabdedddc0; 15f02b91056253e8cdc592888f431da0731337b8 builds before 3b94e62caa1dc1198d0d55d97bd710da1dee15d7; from 15f02b91056253e8cdc592888f431da0731337b8 before 111f74547eee8cfedfb854284e80f35c8a491186; from 15f02b91056253e8cdc592888f431da0731337b8 before dd3b221e21079ade8263fbb7176f3d55ad75d3b6; from 15f02b91056253e8cdc592888f431da0731337b8 before d90150c72d2e6a8a3079e88755dafcfbe91c746d; 15f02b91056253e8cdc592888f431da0731337b8 builds before 5a1ea296f8589ce8f1e3141b2b123b34ad010e19; from 15f02b91056253e8cdc592888f431da0731337b8 before f110b8f58b254bf997cec1bd60701b7798e9bb82; from 15f02b91056253e8cdc592888f431da0731337b8 before 15145675690cab2de1056e7ed68e59cbd0452529 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.7 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10; 7.0; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/21d3ba696918d6373233aac0b9d51fcabdedddc0patch
- https://git.kernel.org/stable/c/3b94e62caa1dc1198d0d55d97bd710da1dee15d7patch
- https://git.kernel.org/stable/c/111f74547eee8cfedfb854284e80f35c8a491186patch
- https://git.kernel.org/stable/c/dd3b221e21079ade8263fbb7176f3d55ad75d3b6patch
- https://git.kernel.org/stable/c/d90150c72d2e6a8a3079e88755dafcfbe91c746dpatch
- https://git.kernel.org/stable/c/5a1ea296f8589ce8f1e3141b2b123b34ad010e19patch
- https://git.kernel.org/stable/c/f110b8f58b254bf997cec1bd60701b7798e9bb82patch
- https://git.kernel.org/stable/c/15145675690cab2de1056e7ed68e59cbd0452529patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.