CVE-2021-3581

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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 28.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-10-05 20:50Z5 YR AGO

Last updated

2024-09-16 19:05Z2 YR AGO

Reserved

2021-06-04

Assigning CNA

zephyr

Record state

PUBLISHED

Severity

High (CVSS 7.0)

CNA CVSS vector

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

Weaknesses

• CWE-805Buffer Access with Incorrect Length ValueBase
• CWE-1284Improper Validation of Specified Quantity in InputBase

Data version

5.1

Document digest

4d10d2448d0b0987f3d75ccf62119f67b4786c65d9d15514d2fd487f2b7a3f4f

• github.comhttp://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5x_refsource_MISC