Vulnerability Intelligence Report
Double Free in net/packet/af_packet.c leading to priviledge escalation
CVE-2021-22600
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
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
6.6
MEDIUM
Exploitability:0.9
Impact Score:5.3
EPSS Probability:5.92%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
—
Weaknesses (CWE)
CWE-415 ↗CWE-415 Double Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Linux Kernel | Kernel | unspecified < 5.4.168 (affected), unspecified < 5.10.88 (affected), unspecified < 5.15.11 (affected), unspecified < 5.16-rc6 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Google LLC · Vendor · USA |
| Reserved | 2021-01-05T00:00:00 |
| Published | 2022-01-26T00:00:00 |
| Last Updated | 2025-10-21T23:15:48 |
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