Linux Kernel up to 6.18.46/7.1.10/7.2.0 ptp vmclock vmclock_miscdev_mmap privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.2$0-$5k1.10

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 6.18.46/7.1.10/7.2.0. Affected by this vulnerability is the function vmclock_miscdev_mmap of the component ptp vmclock. Executing a manipulation can lead to privileges management. This vulnerability is handled as CVE-2026-80724. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.18.46/7.1.10/7.2.0 and classified as problematic. This vulnerability affects the function vmclock_miscdev_mmap of the component ptp vmclock. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect integrity, and availability. CVE summarizes:

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).

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-80724 since 08/26/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/28/2026). The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 6.18.47, 7.1.11 or 7.2.1 eliminates this vulnerability. Applying the patch 5b4f2bec7bea6c04084d720d731bedee7caf878d/2496e141827102d6af512950057d402a2cfb2bfc/2e596e7814ba38cdc129991058b6c254ed37cb11 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-67460). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.47/7.1.11/7.2.1
Patch: 5b4f2bec7bea6c04084d720d731bedee7caf878d/2496e141827102d6af512950057d402a2cfb2bfc/2e596e7814ba38cdc129991058b6c254ed37cb11

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80724 (🔒)
GCVE (CVE): GCVE-0-2026-80724
GCVE (VulDB): GCVE-100-396616
EUVD: 🔒

Entryinfo

Created: 08/28/2026 10:50
Updated: 08/28/2026 11:31
Changes: 08/28/2026 10:50 (59), 08/28/2026 11:31 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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