PT-2021-2547 · Linux+2 · Linux Kernel+2

Paolo Bonzini · Published 2020-08-26 · Updated 2022-04-18 · CVE-2020-36310

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 5.8

Description: An issue in the Linux kernel allows a set memory region test infinite loop for certain nested page faults. This can be exploited to cause a denial of service.

Recommendations: For Linux kernel versions prior to 5.8, update to version 5.8 or later to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable set memory region test function in arch/x86/kvm/svm/svm.c to minimize the risk of exploitation.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALT-PU-2020-2688

ALT-PU-2020-2716

ALT-PU-2020-2770

ALT-PU-2020-3210

ALT-PU-2021-1083

ALT-PU-2021-1105

ALT-PU-2021-1621

ALT-PU-2021-1656

ALT-PU-2021-1739

ALT-PU-2021-1862

ALT-PU-2021-1866

ALT-PU-2021-1870

BDU:2021-01954

CVE-2020-36310

DSA-5095-1

OPENSUSE-SU-2021:0579-1

OPENSUSE-SU-2021:0758-1

OPENSUSE-SU-2021:1975-1

OPENSUSE-SU-2021:1977-1

OPENSUSE-SU-2021_0579-1

OPENSUSE-SU-2021_0758-1

OPENSUSE-SU-2021_1975-1

OPENSUSE-SU-2021_1977-1

SUSE-SU-2021:1211-1

SUSE-SU-2021:1238-1

SUSE-SU-2021:1301-1

SUSE-SU-2021:1572-1

SUSE-SU-2021:1573-1

SUSE-SU-2021:1595-1

SUSE-SU-2021:1596-1

SUSE-SU-2021:1605-1

SUSE-SU-2021:1624-1

SUSE-SU-2021:1625-1

SUSE-SU-2021:1975-1

SUSE-SU-2021:1977-1

Affected Products

Alt Linux

Linux Kernel

Suse

References · 467

• https://osv.dev/vulnerability/openSUSE-SU-2021:0758-1 · Vendor Advisory
• https://debian.org/security/2022/dsa-5095 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1975-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1625-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1605-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01954 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:1573-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1624-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2021-9307.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1595-1 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e72436bc3a5206f95bb384e741154166ddb3202e · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1301-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-36310 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-36310 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:1211-1 · Vendor Advisory