Riskcovery

CVE-2026-46140

Bluetooth: btmtk: validate WMT event SKB length before struct access

State
Published
Severity
Not scored
Published
May 28, 2026
Updated
Jul 4, 2026
Reserved
May 13, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • f0457842215438786e2e205ad06a4fbb8ab63cd0 to before 36c85f7029484d5ede769f8873d16e9c8e35533cAffected
  • d019930b0049fc2648a6b279893d8ad330596e81 to before c411cf1bfde951cfa821809cf4020ba177f76e0cAffected
  • d019930b0049fc2648a6b279893d8ad330596e81 to before 624fb79dadc1b65757986a9d0fdde5c0cf3fe179Affected
  • d019930b0049fc2648a6b279893d8ad330596e81 to before 70d37a8b9229e394cc17ddad47e90b81d80fcd09Affected
  • d019930b0049fc2648a6b279893d8ad330596e81 to before 634a4408c0615c523cf7531790f4f14a422b9206Affected
  • 6.6.142 to before 6.6.144Affected
LinuxLinux
  • 6.11Affected
  • before 6.11Not affected
  • 6.6.144 through 6.6.*Not affected
  • 6.12.88 through 6.12.*Not affected
  • 6.18.30 through 6.18.*Not affected
  • 7.0.7 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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