---
cve: "CVE-2026-46140"
severity: "LOW"
cvss: 3.1
epss: "13%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-05-28 10:16:29"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T08:39:45+02:00"
---

# CVE-2026-46140

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.6.144
- Kernel ≥ 6.12.88
- Kernel ≥ 6.18.30
- Kernel ≥ 7.0.7

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-46140) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_