What is CVE-2026-46140?

CVE-2026-46140 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Read flaw (CWE-125), affecting Linux kernel versions from 6.6.142 onward and patched in 6.6.144, 6.12.88, 6.18.30 and others. CVE-2026-46140 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46140?

CVE-2026-46140 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2026-46140?

Yes, CVE-2026-46140 has been patched. Fixed versions include 6.6.144, 6.12.88, 6.18.30 and others. If you are running Linux kernel 6.6.142 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46140 actively exploited?

CVE-2026-46140 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2026-46140

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 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.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-07-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness type

CWE-125

CVE-2026-46140 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.6.142, 6.11 and later are affected. Fixed in 6.6.144, 6.12.88, 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 6.6.142 ≥ 6.11

Fixed in

✓ 6.6.144 6.6.x ✓ 6.12.88 6.12.x ✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

5 total

Kernel Git
https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179

Patch
Kernel Git
https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206

Patch
Kernel Git
https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09

Patch
Kernel Git
https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c

Patch
Kernel Git
https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c

Details

CVE ID CVE-2026-46140

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-07-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46140?

CVE-2026-46140 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . It affects Linux kernel versions from 6.6.142 onward and has been patched in 6.6.144, 6.12.88, 6.18.30 and others. CVE-2026-46140 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46140?

CVE-2026-46140 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2026-46140?

Yes. CVE-2026-46140 has been patched. Fixed versions include 6.6.144, 6.12.88, 6.18.30 and others. If you are running Linux kernel 6.6.142 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46140 actively exploited?

No. CVE-2026-46140 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.