CVE-2021-22600
ENISA EUVD: EUVD-2021-9736 ↗
Exploited in the Wild
✓ Confirmed 0-Day
★ Google Project Zero
Triaged: March 5, 2026
2 articles
Published: 2022-01-26
EPSS Score
Source: FIRST.org · 2026-05-23
0.18%
probability
This CVE has a 0.18% probability
of being exploited in the next 30 days.
0%
Top 39.1th percentile of all CVEs
100%
CVSS v3.1
Source: VulnerabilityLookup (CIRCL)6.6
MEDIUM
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H
CVSS v2 (legacy)
7.2
HIGH
Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
AV:L/AC:L/Au:N/C:C/I:C/A:C
Description
VulnerabilityLookup (CNA)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 Products
Linux Kernel
Kernel
unspecified
unspecified
unspecified
unspecified
Attack Intelligence
CWE-118
· Incorrect Access of Indexable Resource ('Range Error')
CWE-119
· Buffer Overflow
CWE-1341
· Multiple Releases of Same Resource or Handle
CWE-415
· Double Free
CWE-573
· Improper Following of Specification by Caller
CWE-664
· Improper Control of a Resource Through its Lifetime
CWE-666
· Operation on Resource in Wrong Phase of Lifetime
CWE-672
· Operation on a Resource after Expiration or Release
CWE-675
· Multiple Operations on Resource in Single-Operation Context
CWE-710
· Improper Adherence to Coding Standards
CWE-825
· Expired Pointer Dereference
Google Project Zero
Patched
March 7, 2022
Reported by
???
Root Cause Analysis
???
Exploits & PoC
1
2025-08-29
Chinmay1743/af_packet.c
Proof-Of-Concept to check privileges of af_packet.c for validating the privileges acquired by any hacker upon successful exploitation of CVE-2021-2260
1
2025-09-17
2 repos — triés par ⭐
Rechercher sur GitHub ↗
https://www.debian.org/security/2022/dsa-5096
vendor-advisory
Signal Intelligence
Confidence
95%
EPSS
0.18%
CVSS v3.1
6.6
Mentions
2
Last Seen
Feb 15, 2022
CNA Information
CNA Assigner
Google
CNA Title
Double Free in net/packet/af_packet.c leading to priviledge escalation
Analyst Note
Auto-imported from Google Project Zero — confirmed zero-day by definition.
Triage Info
Decided atMar 05, 2026
Published DateJan 26, 2022