What is CVE-2026-46166?

CVE-2026-46166 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 6.12 onward and patched in 6.12.88, 6.18.30, 7.0.7 and others. CVE-2026-46166 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46166?

CVE-2026-46166 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46166?

Yes, CVE-2026-46166 has been patched. Fixed versions include 6.12.88, 6.18.30, 7.0.7 and others. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46166 actively exploited?

CVE-2026-46166 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-46166

High

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: use safe list iteration in radar detect work The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to be freed and removed from the list. Guard against this to avoid a slab-use-after-free error.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-07-15

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2026-46166 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.12 and later are affected. Fixed in 6.12.88, 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 6.12

Fixed in

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

References

11 total

Kernel Git
https://git.kernel.org/stable/c/120149fb3ebcf674832ca3cafd32bedcdb686dde

Patch
Kernel Git
https://git.kernel.org/stable/c/7577a4b8a10fab45a6ee2045ea038a5adadbb585

Patch
Kernel Git
https://git.kernel.org/stable/c/887ece6c23b49d02a6678e7a8d5ad213d75883ce

Patch
Kernel Git
https://git.kernel.org/stable/c/ac8eb3e18f41e2cc8492cc1d358bcb786c850270

Patch
Red Hat
https://access.redhat.com/errata/RHSA-2026:27288

Showing 5 of 11 references View all on NVD

Details

CVE ID CVE-2026-46166

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-07-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46166?

CVE-2026-46166 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 6.12 onward and has been patched in 6.12.88, 6.18.30, 7.0.7 and others. CVE-2026-46166 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46166?

CVE-2026-46166 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-46166?

Yes. CVE-2026-46166 has been patched. Fixed versions include 6.12.88, 6.18.30, 7.0.7 and others. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46166 actively exploited?

No. CVE-2026-46166 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.