CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2016-9243
HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.
Severity
- EPSS
- 3.5% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- cryptography.io:cryptography
- fedoraproject:fedora
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-q3cj-2r34-2cwc | PyPI | cryptography | <1.5.3 | 1.5.3 |
| PYSEC-2017-8 | PyPI | cryptography | <1.5.3 | 1.5.3 |