CVE-2021-44732

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

2.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 85.9% of scored records. A rank, not a probability.

NVD base score

9.8 (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: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

2021-12-20 00:00Z4 YR AGO

Last updated

2025-11-03 19:26Z11 MO AGO

Reserved

2021-12-08

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-415Double FreeVariant

Data version

5.2

Document digest

e310db711999edcbd22dad3406b10646da95f00ba610745019b37f3062112bdd

• github.comhttps://github.com/ARMmbed/mbedtls/releases
• tls.mbed.orghttps://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12
• bugs.gentoo.orghttps://bugs.gentoo.org/829660
• github.comhttps://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12
• github.comhttps://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0
• github.comhttps://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0
• lists.debian.org[debian-lts-announce] 20221225 [SECURITY] [DLA 3249-1] mbedtls security updatehttps://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlmailing-list
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/06/msg00034.html