CVE-2021-45489
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
- Record
CVE-2021-45489- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
CVE List No score
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
- Record
CVE-2021-45489- Updated
- 2026-11-02
EUVDEUVD-2021-32255 No score
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
- Record
EUVD-2021-32255- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rgh6-hjmr-j5fv No score
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.
- Record
GHSA-rgh6-hjmr-j5fv- Weakness
- CWE-338
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45489 is a high vulnerability (CVSS 7.5) in Netbsd, published December 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 62nd percentile. No source names a fixed version.