CVEvulnerability

CVE-2021-22600

7.0 HIGH Known exploited Published 2022-01-26 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Linux Kernel Privilege Escalation Vulnerability — Linux Kernel

Linux Kernel contains a flaw in the packet socket (AF_PACKET) implementation which could lead to incorrectly freeing memory. A local user could exploit this for denial-of-service (DoS) or possibly for privilege escalation.

Added to KEV
2022-04-11
Remediation due
2022-05-02
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-22600
Status
Analyzed
Published
2022-01-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.6 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H
CVSS 3.1 ([email protected])
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-415

Description

A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

Affected configurations

• netapp 8300 firmware • netapp 8700 firmware • netapp a400 firmware • netapp c400 firmware • linux linux kernel (>= 4.14.175 < 4.14.259) • linux linux kernel (>= 4.19.114 < 4.19.222) • linux linux kernel (>= 5.4.29 < 5.4.168) • linux linux kernel (>= 5.5.14 < 5.10.88) • linux linux kernel (>= 5.11 < 5.15.11) • debian debian linux 9.0 • debian debian linux 10.0 • netapp h410c firmware • netapp h300s firmware • netapp h500s firmware • netapp h700s firmware • netapp h410s firmware

Related

Weakness · CWE (1)

References