Vulnerability · Published Dec 21, 2021 · Assigned by mitre
CVE-2021-45451
High 7.5
In plain English
A high-severity security flaw in the mbedtls package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.0%top 38.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2021-45451 |
| Ubuntu:24.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2021-45451 |
| Ubuntu:25.10 | mbedtls | no fix listed | UBUNTU-CVE-2021-45451 |
Affected products (as reported)
References
- https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0
- FEDORA-2022-ff582c5b0d vendor-advisory
- FEDORA-2022-1dd9dc5140 vendor-advisory