What is CVE-2026-89792?

CVE-2026-89792 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 5.15.157 onward and patched in 5.15.222, 6.1.189, 6.6.158 and others. CVE-2026-89792 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89792?

CVE-2026-89792 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-2026-89792?

Yes, CVE-2026-89792 has been patched. Fixed versions include 5.15.222, 6.1.189, 6.6.158 and others. If you are running Linux kernel 5.15.157 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89792 actively exploited?

CVE-2026-89792 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89792

High

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-10-03

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

Affected versions

Linux kernel versions 5.15.157, 6.1.85, 6.6.26, 6.8.5, 6.9 and later are affected. Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.6, 7.3-rc2 and their respective stable series.

Affected from

≥ 5.15.157 ≥ 6.1.85 ≥ 6.6.26 ≥ 6.8.5 ≥ 6.9

Fixed in

✓ 5.15.222 5.15.x ✓ 6.1.189 6.1.x ✓ 6.6.158 6.6.x ✓ 6.12.111 6.12.x ✓ 6.18.53 6.18.x ✓ 7.2.6 7.2.x ✓ 7.3-rc2

References

7 total

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2026-89792

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2026-09-16

Modified 2026-10-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-89792?

CVE-2026-89792 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 5.15.157 onward and has been patched in 5.15.222, 6.1.189, 6.6.158 and others. CVE-2026-89792 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89792?

CVE-2026-89792 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-2026-89792?

Yes. CVE-2026-89792 has been patched. Fixed versions include 5.15.222, 6.1.189, 6.6.158 and others. If you are running Linux kernel 5.15.157 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89792 actively exploited?

No. CVE-2026-89792 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.