What is CVE-2026-80685?

CVE-2026-80685 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 6.12.111 onward and patched in 6.18.44, 7.1.8 and 7.2. CVE-2026-80685 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-80685?

CVE-2026-80685 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-2026-80685?

Yes, CVE-2026-80685 has been patched. Fixed versions include 6.18.44, 7.1.8 and 7.2. If you are running Linux kernel 6.12.111 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-80685 actively exploited?

CVE-2026-80685 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-80685

High

In the Linux kernel, the following vulnerability has been resolved: mm/util: don't read __page_2 for order-1 folios in snapshot_page() snapshot_page() currently reads __page_2 after checking nr_pages > 1, but it should only do so when nr_pages > 2. If an order-1 folio is allocated at the end of a vmemmap section, __page_2 will not exist and reading it will cause a fault. During DLPAR memory remove on a 22 TB ppc64le LPAR, snapshot_page() oopsed on the page isolation path while reading an order-1 folio's __page_2 from an adjacent absent section (unmapped vmemmap). Fix this to avoid reading memmap that doesn't exist (e.g., a vmemmap hole).

Package Linux Kernel

Published 2026-08-28

Last modified 2026-09-21

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 6.12.111, 6.15 and later are affected. Fixed in 6.18.44, 7.1.8, 7.2 and their respective stable series.

Affected from

≥ 6.12.111 ≥ 6.15

Fixed in

✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2

References

3 total

Details

CVE ID CVE-2026-80685

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2026-08-28

Modified 2026-09-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-80685?

CVE-2026-80685 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 6.12.111 onward and has been patched in 6.18.44, 7.1.8 and 7.2. CVE-2026-80685 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-80685?

CVE-2026-80685 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-2026-80685?

Yes. CVE-2026-80685 has been patched. Fixed versions include 6.18.44, 7.1.8 and 7.2. If you are running Linux kernel 6.12.111 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-80685 actively exploited?

No. CVE-2026-80685 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.