What is CVE-2026-46039?

CVE-2026-46039 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 6.16.9 onward and patched in 6.18.27, 7.0.4 and 7.1-rc1. CVE-2026-46039 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46039?

CVE-2026-46039 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46039?

Yes, CVE-2026-46039 has been patched. Fixed versions include 6.18.27, 7.0.4 and 7.1-rc1. If you are running Linux kernel 6.16.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46039 actively exploited?

CVE-2026-46039 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46039

Critical

In the Linux kernel, the following vulnerability has been resolved: rxgk: Fix potential integer overflow in length check Fix potential integer overflow in rxgk_extract_token() when checking the length of the ticket. Rather than rounding up the value to be tested (which might overflow), round down the size of the available data.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-05-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.16.9, 6.17 and later are affected. Fixed in 6.18.27, 7.0.4, 7.1-rc1 and their respective stable series.

Affected from

≥ 6.16.9 ≥ 6.17

Fixed in

✓ 6.18.27 6.18.x ✓ 7.0.4 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-46039 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/183d37f12d1c8ed24a5bfc7addad05510da22a94
Patch
Kernel patch commit
https://git.kernel.org/stable/c/43222ac484f93b3ec2d240a7575e1cedd31f5fa4
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6929350080f4da292d111a3b33e53138fee51cec
Patch

Details

CVE ID CVE-2026-46039

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-05-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46039?

CVE-2026-46039 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 6.16.9 onward and has been patched in 6.18.27, 7.0.4 and 7.1-rc1. CVE-2026-46039 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46039?

CVE-2026-46039 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-46039?

Yes — CVE-2026-46039 has been patched. Fixed versions include 6.18.27, 7.0.4 and 7.1-rc1. If you are running Linux kernel 6.16.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46039 actively exploited?

No — CVE-2026-46039 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.