CVE-2021-4159

2022-08-2415:10:57

CWE-202

redhat

www.cve.org

linux kernel

ebpf

verifier

vulnerability

memory

attacker

permissions

exploit

mitigations

AI Score

5.9

Confidence

High

EPSS

Percentile

5.1%

JSON

A vulnerability was found in the Linux kernel’s EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Fixed in v5.7-rc1"
      }
    ]
  }
]