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Vulnerability record · CVE-2021-45488 · published 25 December 2021

CVE-2021-45488: Netbsd vulnerability

Netbsd · Netbsd

In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.

7.5 CVSS 3.1 High EPSS 0.96% · top 39.8% CWE-330 · CWE-330
7.5CVSS 3.1 base score, v2 5.0
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc PatchVendor Advisory
https://arxiv.org/pdf/2112.09604.pdf Technical DescriptionThird Party Advisory
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc PatchVendor Advisory
https://arxiv.org/pdf/2112.09604.pdf Technical DescriptionThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-45488), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.