CVE-2026-80724

CVE CVE-2026-80724EUVD EUVD-2026-67460Published 2026-08-28T07:03:08.000ZLast changed 2026-08-31T06:12:23.000ZCVSS 8.8

What the advisory describes

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).

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 20503272422693d793b84f88bf23fe4e955d3a33 <5b4f2bec7bea6c04084d720d731bedee7caf878d; 20503272422693d793b84f88bf23fe4e955d3a33 <2496e141827102d6af512950057d402a2cfb2bfc; 20503272422693d793b84f88bf23fe4e955d3a33 <a5edadbae57e2298a56cf7a4e774a027905a331f; 20503272422693d793b84f88bf23fe4e955d3a33 <2e596e7814ba38cdc129991058b6c254ed37cb11; patch: 0; patch: 7.3-rc1; 6.13; patch: 6.18.47; patch: 7.2.1; patch: 7.1.11

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.