CVE-2021-22556

Published: May 3, 2022Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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 recommend upgrading to kernel version 4.1 or beyond.

Affected (1)

Products: Google: Fuchsia

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Google Fuchsia	Before 4.1

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (4)

https://fuchsia-review.googlesource.com/c/fuchsia/+/570881

Source: cve-coordination@google.com

Issue TrackingPatchThird Party Advisory

https://fuchsia.dev/whats-new/release-notes/f4-1

Source: cve-coordination@google.com

Release NotesVendor Advisory

https://fuchsia-review.googlesource.com/c/fuchsia/+/570881

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingPatchThird Party Advisory

https://fuchsia.dev/whats-new/release-notes/f4-1

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

Timeline

No history available yet.