Overview
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.
https://nvd.nist.gov/vuln/detail/CVE-2021-22600
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-22600 |
| Vendor / Product | Linux — Kernel |
| NVD Published | 2022-01-26 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 6.6 |
| CVSS 3.1 Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H |
| Severity | MEDIUM |
| CWE | CWE-415 |
| CISA KEV Added | 2022-04-11 |
| CISA KEV Deadline | 2022-05-02 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2022-05-02.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-04-11 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-05-02 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-22600 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |