What is CVE-2021-22566?

CVE-2021-22566 is a critical-severity vulnerability in Google Fuchsia, classified under Permission Issues. CVSS score: 9.8/10. Published 2022-01-18.

How severe is CVE-2021-22566?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Google Fuchsia

CVE-2021-22566

An incorrect setting of UXN bits within mmu_flags_to_s1_pte_attr lead to privileged executable pages being mapped as executable from an unprivileged context. This can be leveraged by an attacker to bypass executability restrictions of kern…

EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Google Fuchsia
Google Llc Fuchsia — versions 0

Weakness classification (CWE)

CWE-275 — Permission Issues
CWE-732 — Incorrect Permission Assignment for Critical Resource

References

cve-coordination@google.com (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-22566?: CVE-2021-22566 is a critical-severity vulnerability in Google Fuchsia, classified under Permission Issues. CVSS score: 9.8/10. Published 2022-01-18.
How severe is CVE-2021-22566?: Critical severity. CVSS v3 base score is 9.8 out of 10.