CVE-2021-44732
CriticalPublic PoCUpdated
Published: 20 December 2021
Published
20 December 2021
Modified
05 June 2026
KEV Added
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Patch
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CVSS Score v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0138
80.7th percentile
Risk Priority
20
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-44732 is a critical-severity Double Free (CWE-415) vulnerability in Arm Mbed Tls. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 19.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-31547
Vulnerability details
Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
arm
mbed tls
≤ 2.16.12 · 2.17.0 — 2.28.0
trustedfirmware
mbed tls
3.0.0
debian
debian linux
10.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.