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Vulnerability record · CVE-2026-88830 · published 23 September 2026

CVE-2026-88830: A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer…

A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.

7.5 CVSS 3.1 High EPSS 0.35% · top 73.8% CWE-131 · CWE-131 Awaiting Analysis
7.5CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
23 Sep 2026Last modified by NVD

Description

A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-88830
https://bugzilla.redhat.com/show_bug.cgi?id=2531344

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Related vulnerabilities

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

7.8CVE-2020-17087Windows Kernel Pool Buffer Overflow Local Privilege EscalationCVE-2020-17087 is a local elevation of privilege flaw in the Windows kernel, classified as CWE-131 (incorrect calculation of buffer size). A local at…KEVEPSS 5.4%analysed

Source: NIST National Vulnerability Database (record CVE-2026-88830), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.