CVE-2021-4159EPSS p16.2%

CVE-2021-4159CVE-2021-4159

linux / linux_kernel

Description

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.

Scoring

CVSS 4.4 ()
VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS0.25% probability of exploitation · percentile 16.2% · 2026-11-03T12:00:27Z
Last modified2026-11-02
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.