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Linux CVE-2026-46140

| EUVD-2026-32767
2026-05-28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 GHSA-vpw8-mw7p-fcg5

Lifecycle Timeline

2
Patch available
May 28, 2026 - 12:31 EUVD
CVE Published
May 28, 2026 - 10:16 nvd
UNKNOWN (no severity yet)

DescriptionNVD

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.

Analysis

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. …

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CVE-2026-46140 vulnerability details – vuln.today

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