Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6.142, < 6.7 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c
- https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179Patch
- https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206Patch
- https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09Patch
- https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0cPatch
FAQ
What is CVE-2026-46140?
CVE-2026-46140 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 dat...
How severe is CVE-2026-46140?
CVE-2026-46140 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46140?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.