PT-2021-8134 · Linux+3 · Linux Kernel+3

Published 2021-12-17 · Updated 2026-03-14 · CVE-2021-47105

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 (affected versions not specified)

Description The issue is related to errors in security settings of the xsk component in the Linux kernel. Exploitation of this issue may allow an attacker to execute arbitrary code and elevate their privileges. The problem is caused by the failure to return xsk buffers to the pool when cleaning the ring, leading to buffer leakage. To address this, a missing xsk buff free() call has been added to the routine responsible for cleaning the ring entries.

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

Memory Leak

Weakness Enumeration

CWE-402

CWE-401

Related Identifiers

BDU:2024-08396

CVE-2021-47105

OPENSUSE-SU-2024_1321-1

OPENSUSE-SU-2024_1322-1

OPENSUSE-SU-2024_1322-2

OPENSUSE-SU-2024_1332-1

OPENSUSE-SU-2024_1332-2

OPENSUSE-SU-2024_1466-1

OPENSUSE-SU-2024_1480-1

OPENSUSE-SU-2024_1490-1

SUSE-SU-2024:1320-1

SUSE-SU-2024:1321-1

SUSE-SU-2024:1466-1

SUSE-SU-2024:1480-1

SUSE-SU-2024:1490-1

Affected Products

Debian

Linux Kernel

Red Os

Suse

References · 465

• https://bdu.fstec.ru/vul/2024-08396 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:1320-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1466-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2021-47105 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47105 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47105 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47105 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47105 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47105 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1480-1 · Vendor Advisory
• https://git.kernel.org/stable/c/ad6d20da2cfbe14b7b1200d15f39e65988b0b9e8 · Patch
• https://git.kernel.org/stable/c/afe8a3ba85ec2a6b6849367e25c06a2f8e0ddd05 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1490-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47105 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47105 · Vendor Advisory