CVE-2021-44732
mbedtls: Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_se...
CVE-2021-44732 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2021-44732, released December 20, 2021. It is not reported as exploited. Patch Radar priority: Urgent.
Urgent
CVSS
9.8
critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0277
86th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libmbedcrypto1 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedcrypto1 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedcrypto3 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedcrypto3 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedtls10 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedtls10 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedtls12 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedtls12 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 18.04.6 LTS (bionic) | 2.8.0-1ubuntu0.1~esm1 | libmbedx509-0 2.8.0-1ubuntu0.1~esm1 | Jul 20, 2025 |
| libmbedx509-0 · Ubuntu 20.04 LTS (focal) | 2.16.4-1ubuntu2+esm1 | libmbedx509-0 2.16.4-1ubuntu2+esm1 | Jul 20, 2025 |
| mbedtls · Debian 12.15 (bookworm) | 2.28.0-0.3 | DEBIAN-CVE-2021-44732 | Dec 20, 2021 |
| mbedtls · Debian 13.5 (trixie) | 2.28.0-0.3 | DEBIAN-CVE-2021-44732 | Dec 20, 2021 |
| mbedtls · Debian 14 | 2.28.0-0.3 | DEBIAN-CVE-2021-44732 | Dec 20, 2021 |
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