CVE-2022-0264

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-02-04 · updated 2026-10-08
Weakness: CWE-755

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. This flaws affects kernel versions < v5.16-rc6

Affected products

Linux kernel: before 5.16; 5.16, 5.16-rc1, 5.16-rc2, 5.16-rc3, 5.16-rc4, 5.16-rc5 — fixed in 5.16

How to fix

Upgrade to a fixed version: Linux kernel 5.16. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-0264 or the next vulnerability affects your stack