What is CVE-2026-80724?

CVE-2026-80724 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.18.47, 6.18.50, 7.1.11 and others. CVE-2026-80724 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-80724?

CVE-2026-80724 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-80724?

Yes, CVE-2026-80724 has been patched. Fixed versions include 6.18.47, 6.18.50, 7.1.11 and others. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-80724 actively exploited?

CVE-2026-80724 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-80724

High

In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: prevent read-only mappings from becoming writable vmclock_miscdev_mmap() rejects writable mappings of the shared vmclock ABI page with -EROFS, but leaves VM_MAYWRITE set. Userspace can map the page read-only and then upgrade it to writable with mprotect(), after which the guest can corrupt the host-written timekeeping data (sequence counter, UTC time, TSC offset) that the vmclock ABI defines as read-only. Clear VM_MAYWRITE on the read-only path so the mapping cannot be upgraded, as i915 does for its read-only objects and as fixed in drm/vc4 (CVE-2026-68445) and drm/panthor (CVE-2024-53071).

Package Linux Kernel

Published 2026-08-28

Last modified 2026-09-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.18.47, 6.18.50, 7.1.11, 7.2.1, 7.2.4, 7.3-rc1 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.18.47 6.18.x ✓ 6.18.50 6.18.x ✓ 7.1.11 7.1.x ✓ 7.2.1 7.2.x ✓ 7.2.4 7.2.x ✓ 7.3-rc1

References

6 total

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-80724

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-08-28

Modified 2026-09-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-80724?

CVE-2026-80724 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.18.47, 6.18.50, 7.1.11 and others. CVE-2026-80724 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-80724?

CVE-2026-80724 has a CVSS score of 8.8 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:H/I:H/A:H.
Is there a patch available for CVE-2026-80724?

Yes. CVE-2026-80724 has been patched. Fixed versions include 6.18.47, 6.18.50, 7.1.11 and others. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-80724 actively exploited?

No. CVE-2026-80724 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.