What is CVE-2026-89806?

CVE-2026-89806 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, affecting Linux kernel versions from 6.2 onward and patched in 6.12.112, 6.18.51, 7.2.5 and others. CVE-2026-89806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89806?

CVE-2026-89806 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-2026-89806?

Yes, CVE-2026-89806 has been patched. Fixed versions include 6.12.112, 6.18.51, 7.2.5 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89806 actively exploited?

CVE-2026-89806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89806

High

In the Linux kernel, the following vulnerability has been resolved: drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation The framebuffer size calculation `fb_size = linebytes * height` can overflow when both values are large (e.g., 46341 * 46341 > INT_MAX). Since linebytes and height are both int types, the multiplication is performed as int * int, which results in undefined behavior on overflow. Use check_mul_overflow() to detect and prevent this overflow, consistent with the approach used in simpledrm.c and corebootdrm.c.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-10-03

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 6.2 and later are affected. Fixed in 6.12.112, 6.18.51, 7.2.5, 7.3-rc2 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.12.112 6.12.x ✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc2

References

4 total

Details

CVE ID CVE-2026-89806

Severity High

CVSS score 8.4 / 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-2026-89806?

CVE-2026-89806 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 . It affects Linux kernel versions from 6.2 onward and has been patched in 6.12.112, 6.18.51, 7.2.5 and others. CVE-2026-89806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89806?

CVE-2026-89806 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-2026-89806?

Yes. CVE-2026-89806 has been patched. Fixed versions include 6.12.112, 6.18.51, 7.2.5 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89806 actively exploited?

No. CVE-2026-89806 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.