CVE-2021-22556
Integer Overflow in Fuchsia Kernel
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
El equipo de seguridad detectó un fallo de desbordamiento de enteros que permite a un atacante con ejecución de código emitir operaciones de no comprobación de la caché de memoria en páginas que no posee, lo que le permite controlar la memoria del kernel desde el espacio de usuario. Es recomendado actualizar a la versión 4.1 del kernel o superior
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-01-05 CVE Reserved
- 2022-05-03 CVE Published
- 2023-11-24 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-190: Integer Overflow or Wraparound
CAPEC
References (2)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://fuchsia-review.googlesource.com/c/fuchsia/+/570881 | 2022-05-10 |
| URL | Date | SRC |
|---|---|---|
| https://fuchsia.dev/whats-new/release-notes/f4-1 | 2022-05-10 |