PT-2021-4243 · Linux+5 · Linux Kernel+5

Lai Jiangshan + 1 · Published 2021-06-08 · Updated 2023-05-17 · CVE-2021-38198

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.12.11

Description The issue is related to the incorrect computation of access permissions for a shadow page in the Linux kernel, leading to a missing guest protection page fault. This could potentially allow an attacker to cause a denial of service. The estimated number of potentially affected devices and details about real-world incidents are not provided.

Recommendations For versions prior to 5.12.11, update to version 5.12.11 or later to resolve the issue. As a temporary workaround, consider restricting access to critical resources to minimize the risk of exploitation.

Exploit

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

ALT-PU-2021-2025

ALT-PU-2021-2026

ALT-PU-2021-2315

ALT-PU-2021-2326

ALT-PU-2021-2330

ALT-PU-2021-3481

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

AZL-6582

BDU:2021-04850

CVE-2021-38198

DLA-2785-1

DLA-2843-1

OESA-2021-1331

OPENSUSE-SU-2021:1271-1

OPENSUSE-SU-2021:3179-1

OPENSUSE-SU-2021:3205-1

OPENSUSE-SU-2021:3876-1

OPENSUSE-SU-2021_1271-1

OPENSUSE-SU-2021_3179-1

OPENSUSE-SU-2021_3205-1

OPENSUSE-SU-2021_3876-1

SUSE-SU-2021:14849-1

SUSE-SU-2021:3073-1

SUSE-SU-2021:3177-1

SUSE-SU-2021:3178-1

SUSE-SU-2021:3179-1

SUSE-SU-2021:3192-1

SUSE-SU-2021:3196-1

SUSE-SU-2021:3205-1

SUSE-SU-2021:3205-2

SUSE-SU-2021:3206-1

SUSE-SU-2021:3207-1

SUSE-SU-2021:3217-1

SUSE-SU-2021:3415-1

SUSE-SU-2021:3876-1

SUSE-SU-2021:3929-1

SUSE-SU-2021:3935-1

SUSE-SU-2021:3969-1

SUSE-SU-2021:3972-1

SUSE-SU-2021_14849-1

USN-5070-1

USN-5114-1

USN-5116-1

USN-5116-2

USN-5343-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 511

• 🔥 https://github.com/torvalds/linux/commit/b1bd5cba3306691c771d558e94baa73e8b0b96b7 · Exploit
• https://cve.org/CVERecord?id=CVE-2021-38198 · Security Note
• https://osv.dev/vulnerability/USN-5116-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42008 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38160 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38198 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:14849-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-43389 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3679 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38207 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3929-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38204 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3935-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3506 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3179-1 · Vendor Advisory