What is CVE-2021-22556?

CVE-2021-22556 is a medium-severity vulnerability in Google Fuchsia, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2022-05-03.

How severe is CVE-2021-22556?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Integer overflow in Google Fuchsia

CVE-2021-22556

The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommen…

Vulnerability class: Integer Overflow

EPSS: 0.002 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.

Affected products

Google Fuchsia
Google Llc Fuchsia Kernel — versions unspecified

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

cve-coordination@google.com (x_refsource_MISC, Release Notes, Vendor Advisory)
cve-coordination@google.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-22556?: CVE-2021-22556 is a medium-severity vulnerability in Google Fuchsia, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2022-05-03.
How severe is CVE-2021-22556?: Medium severity. CVSS v3 base score is 5.3 out of 10.