PT-2021-4235 · Linux+5 · Linux Kernel+5

Zheyu Ma · Published 2021-04-04 · Updated 2024-06-15 · CVE-2021-3483

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/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 5.12-rc6

Description A flaw was found in the Nosy driver in the Linux kernel, allowing a device to be inserted twice into a doubly-linked list. This leads to a use-after-free when one of these devices is removed, posing a threat to confidentiality, integrity, and system availability.

Recommendations For versions prior to 5.12-rc6, update to kernel version 5.12-rc6 or later to resolve the issue. As a temporary workaround, consider restricting access to the Nosy driver to minimize the risk of exploitation.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2021-1833

ALT-PU-2021-1888

ALT-PU-2021-1896

ALT-PU-2021-1983

ALT-PU-2021-3481

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

AZL-6568

BDU:2021-04841

CVE-2021-3483

DLA-2689-1

DLA-2690-1

MGASA-2021-0191

MGASA-2021-0192

OESA-2021-1176

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

OPENSUSE-SU-2024:10728-1

OPENSUSE-SU-2024:13704-1

SUSE-SU-2021:1210-1

SUSE-SU-2021:1211-1

SUSE-SU-2021:1238-1

SUSE-SU-2021:1248-1

SUSE-SU-2021:1266-1

SUSE-SU-2021:1301-1

SUSE-SU-2021:14724-1

SUSE-SU-2021:1573-1

SUSE-SU-2021:1596-1

SUSE-SU-2021:1617-1

SUSE-SU-2021:1623-1

SUSE-SU-2021:1624-1

SUSE-SU-2021:1625-1

SUSE-SU-2021:1975-1

SUSE-SU-2021:1977-1

SUSE-SU-2021_14724-1

USN-4948-1

USN-4979-1

USN-4982-1

USN-4984-1

USN-5299-1

USN-5343-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 826

• https://osv.dev/vulnerability/SUSE-SU-2021:1975-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0579-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29154 · Security Note
• https://ubuntu.com/security/CVE-2021-42008 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38160 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0191.html · Security Note
• https://ubuntu.com/security/CVE-2021-43389 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30002 · Security Note
• https://ubuntu.com/security/notices/USN-4948-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3679 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1248-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36312 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-3483 · Security Note
• https://osv.dev/vulnerability/MGASA-2021-0192 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3506 · Security Note