CVE-2020-10027

ARC Platform Uses Signed Integer Comparison When Validating Syscall Numbers

7.8 High

An attacker who has obtained code execution within a user thread is able to elevate privileges to that of the kernel. See NCC-ZEP-001 This issue affects: zephyrproject-rtos zephyr version 1.14.0 and later versions. version 2.1.0 and later versions.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.69%Down 1.5 points since Apr 14, 2021

What each source reports

CVE List Score used 7.8

ARC Platform Uses Signed Integer Comparison When Validating Syscall Numbers

Record: CVE-2020-10027
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-697
Updated: 2026-11-02

EUVDEUVD-2020-2492 7.8

Record: EUVD-2020-2492
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mwc4-px37-jrx4 No score

An attacker who has obtained code execution within a user thread is able to elevate privileges to...

Record: GHSA-mwc4-px37-jrx4
Updated: 2026-11-02

NVD 7.8

Record: CVE-2020-10027
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-697
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-10027 is a high vulnerability (CVSS 7.8) in Zephyrproject Zephyr, published May 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 53rd percentile. No source names a fixed version.