Vulnerability Intelligence Report
CVE-2021-34866
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.
No Active Exploit Signals
CVSS Base Score
8.8
HIGH
Exploitability:2.1
Impact Score:6.1
EPSS Probability:0.97%
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
—
SSVC Action
—
Weaknesses (CWE)
CWE-843 ↗CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Linux | Kernel | 5.14-rc3 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.972%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Zero Day Initiative · Bug Bounty Provider · Japan |
| Reserved | 2021-06-17T00:00:00 |
| Published | 2022-01-25T15:30:36 |
| Last Updated | 2024-08-04T00:26:54 |
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