PT-2024-27188 · Linux+6 · Linux Kernel+6

Published 2024-04-22 · Updated 2026-03-13 · CVE-2024-36881

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the userfaultfd feature in the Linux kernel, where the unregister process did not properly remove write-protect bits from page table entries when a userfaultfd was closed. This could lead to leftover write-protect bits being observable by the user, although it is hoped to be harmless. The change is important after a recent page-table-check patch, as it ensures sanity checks on userfaultfd write-protect bits without virtual memory area context.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Preservation of Permissions

Weakness Enumeration

CWE-281

Related Identifiers

ALSA-2025_12746

ALSA-2025_12752

ALSA-2025_12753

ALSA-2025_16880

BDU:2025-03055

CVE-2024-36881

ECHO-02AB-A485-9BB2

INFSA-2024_9315

MGASA-2024-0263

MGASA-2024-0266

OESA-2024-1897

RHSA-2024:9315

RHSA-2024_9315

SUSE-SU-2024:3194-1

SUSE-SU-2024:3195-1

SUSE-SU-2024:3383-1

SUSE-SU-2025:20044-1

SUSE-SU-2025:20047-1

USN-6949-1

USN-6949-2

USN-6952-1

USN-6952-2

USN-6955-1

Affected Products

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Hat

Suse

Ubuntu

References · 1218

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36881.json · Exploit
• https://ubuntu.com/security/CVE-2024-38578 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-36926 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-38603 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-36958 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-40936 · Security Note
• https://ubuntu.com/security/CVE-2024-38567 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-35855 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-40912 · Security Note
• https://ubuntu.com/security/CVE-2024-38576 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-36892 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-38560 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-38555 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6955-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-36011 · Vendor Advisory