What is CVE-2026-89992?

CVE-2026-89992 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, affecting Linux kernel versions from 5.18 onward and patched in 6.1.188, 6.6.157, 6.12.110 and others. CVE-2026-89992 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89992?

CVE-2026-89992 has a CVSS score of 8.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-89992?

Yes, CVE-2026-89992 has been patched. Fixed versions include 6.1.188, 6.6.157, 6.12.110 and others. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89992 actively exploited?

CVE-2026-89992 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89992

High

In the Linux kernel, the following vulnerability has been resolved: cpuidle: dt_idle_genpd: kfree() the original name allocation dt_idle_pd_alloc() kasprintf()s the full node path, then points pd->name at kbasename() of that string. dt_idle_pd_free() kfree()s pd->name, which is no longer the start of the allocation. Copy the basename instead.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-09-16

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.4

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.18 and later are affected. Fixed in 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3-rc2 and their respective stable series.

Affected from

≥ 5.18

Fixed in

✓ 6.1.188 6.1.x ✓ 6.6.157 6.6.x ✓ 6.12.110 6.12.x ✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc2

References

6 total

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-89992

Severity High

CVSS score 8.4 / 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-2026-89992?

CVE-2026-89992 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 . It affects Linux kernel versions from 5.18 onward and has been patched in 6.1.188, 6.6.157, 6.12.110 and others. CVE-2026-89992 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89992?

CVE-2026-89992 has a CVSS score of 8.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-89992?

Yes. CVE-2026-89992 has been patched. Fixed versions include 6.1.188, 6.6.157, 6.12.110 and others. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89992 actively exploited?

No. CVE-2026-89992 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.