CVE-2021-3320

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 55.4% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-05-24 21:40Z5 YR AGO

Last updated

2024-09-16 22:25Z1 YR AGO

Reserved

2021-01-27

Assigning CNA

zephyr

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase
• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base

Data version

5.1

Document digest

f2de9f1a95d3058cd0c3cfa9e82b01d01a9092b68aedf73fca19339bdb819ad7

• github.comhttp://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-27r3-rxch-2hm7x_refsource_MISC