PT-2021-8153 · Linux+3 · Linux Kernel+3

Published 2021-11-16 · Updated 2026-03-14 · CVE-2021-47199

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 vulnerability is related to the net/mlx5e component of the Linux kernel, specifically with the CT clear action offload. When a flow includes encap action, a neigh update event can cause the driver to unoffload the flow and then reoffload it, leading to multiple allocations and a memleak of mod acts. The issue is caused by the driver never releasing the allocated mod hdr actions. The vulnerability can be exploited to cause a denial of service.

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2024-09139

CVE-2021-47199

OESA-2024-1566

OPENSUSE-SU-2024_1641-1

OPENSUSE-SU-2024_1644-1

OPENSUSE-SU-2024_1659-1

OPENSUSE-SU-2024_1663-1

SUSE-SU-2024:1641-1

SUSE-SU-2024:1644-1

SUSE-SU-2024:1647-1

SUSE-SU-2024:1659-1

SUSE-SU-2024:1663-1

Affected Products

Debian

Linux Kernel

Red Os

Suse

References · 584

• https://nvd.nist.gov/vuln/detail/CVE-2024-26641 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47199 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47199 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47199 · Vendor Advisory
• https://git.kernel.org/stable/c/806401c20a0f9c51b6c8fd7035671e6ca841f6c2 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1644-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-26636 · Security Note
• https://osv.dev/vulnerability/OESA-2024-1566 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47182 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26752 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47199 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47211 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2021-47199 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47199 · Vendor Advisory
• https://git.kernel.org/stable/c/486e8de6e233ff2999493533c6259d1cb538653b · Patch