What is CVE-2026-89911?

CVE-2026-89911 is a High severity Linux kernel vulnerability with a CVSS score of 7.9 out of 10, affecting Linux kernel versions from 6.16 onward and patched in 6.18.51, 7.2.5 and 7.3-rc1. CVE-2026-89911 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89911?

CVE-2026-89911 has a CVSS score of 7.9 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H.

Is there a patch available for CVE-2026-89911?

Yes, CVE-2026-89911 has been patched. Fixed versions include 6.18.51, 7.2.5 and 7.3-rc1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89911 actively exploited?

CVE-2026-89911 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89911

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap TLBI Range to the architural limit TLB Invalidation by Range has a fairly powerful way of encoding pretty large ranges in a small number of bits. This range can be based on an arbitrary VA, which means it is pretty easy for a guest to generate an overflow should the hypervisor be naive enough to add the range to the base... Make sure the range is capped to the limit dictated by the address bit that determines the VA range. For an IPA invalidation, this is further corrected down the line to ignore the upper range.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-09-16

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.9

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.16 and later are affected. Fixed in 6.18.51, 7.2.5, 7.3-rc1 and their respective stable series.

Affected from

≥ 6.16

Fixed in

✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc1

References

3 total

Details

CVE ID CVE-2026-89911

Severity High

CVSS score 7.9 / 10

CVSS version 3.1

Published 2026-09-16

Modified 2026-09-16

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-89911?

CVE-2026-89911 is a High severity Linux kernel vulnerability with a CVSS score of 7.9 out of 10 . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.51, 7.2.5 and 7.3-rc1. CVE-2026-89911 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89911?

CVE-2026-89911 has a CVSS score of 7.9 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:C/C:L/I:L/A:H.
Is there a patch available for CVE-2026-89911?

Yes. CVE-2026-89911 has been patched. Fixed versions include 6.18.51, 7.2.5 and 7.3-rc1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89911 actively exploited?

No. CVE-2026-89911 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.