High 7.1Published May 28, 2026

CVE-2026-46140Bluetooth: btmtk: validate WMT event SKB length before struct access

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btmtk: validate WMT event SKB length before struct access btmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to struct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc (9 bytes) without first checking that the SKB contains enough data. A short firmware response causes out-of-bounds reads from SKB tailroom. Use skb_pull_data() to validate and advance past the base WMT event header. For the FUNC_CTRL case, pull the additional status field bytes before accessing them.

CVSS: 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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: Undergoing Analysis
Record last updated: Jul 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f0457842215438786e2e205ad06a4fbb8ab63cd0 before 36c85f7029484d5ede769f8873d16e9c8e35533c; from d019930b0049fc2648a6b279893d8ad330596e81 before c411cf1bfde951cfa821809cf4020ba177f76e0c; from d019930b0049fc2648a6b279893d8ad330596e81 before 624fb79dadc1b65757986a9d0fdde5c0cf3fe179; from d019930b0049fc2648a6b279893d8ad330596e81 before 70d37a8b9229e394cc17ddad47e90b81d80fcd09; from d019930b0049fc2648a6b279893d8ad330596e81 before 634a4408c0615c523cf7531790f4f14a422b9206; from 6.6.142 before 6.6.144	CNA record
linux linux_kernel linux:linux_kernel	from 6.6.142 before 6.7; from 6.11 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1	NVD

References

References

https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c
https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c	patch
https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179	patch
https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09	patch
https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206	patch

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.