PT-2020-4970 · Linux+4 · Linux Kernel+4

Published 2020-07-24 · Updated 2023-07-28 · CVE-2020-29369

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.7.11

Description A race condition exists between certain expand functions (expand downwards and expand upwards) and page-table free operations from an munmap call. This issue can be exploited to cause a denial of service.

Recommendations For Linux kernel versions prior to 5.7.11, update to version 5.7.11 or later to resolve the issue. As a temporary workaround, consider restricting access to the mm/mmap.c functions to minimize the risk of exploitation.

Exploit

Fix

Race Condition

Use After Free

Weakness Enumeration

CWE-362

CWE-416

Related Identifiers

ALT-PU-2020-2477

ALT-PU-2020-2494

ALT-PU-2020-2510

ALT-PU-2020-2687

ALT-PU-2020-2716

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:2020-05547

CVE-2020-29369

OPENSUSE-SU-2020:2161-1

OPENSUSE-SU-2020:2260-1

OPENSUSE-SU-2020_2161-1

OPENSUSE-SU-2020_2260-1

OPENSUSE-SU-2021:0242-1

OPENSUSE-SU-2021_0242-1

SUSE-SU-2020:3713-1

SUSE-SU-2020:3748-1

SUSE-SU-2020:3764-1

SUSE-SU-2020:3843-1

SUSE-SU-2020_3843-1

USN-4752-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 907

• 🔥 https://bugs.chromium.org/p/project-zero/issues/detail?id=2056 · Exploit
• https://bdu.fstec.ru/vul/2020-05547 · Security Note
• https://ubuntu.com/security/CVE-2020-25212 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-29371 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-29369 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2020:2161-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25284 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25643 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-29369 · Vendor Advisory
• http://openwall.com/lists/oss-security/2021/02/10/6 · Patch
• https://ubuntu.com/security/CVE-2020-27152 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-24490 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:3748-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-14314 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15436 · Vendor Advisory