What is CVE-2026-88830?

CVE-2026-88830 is a high-severity vulnerability in Red Hat Hardened Images, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.5/10. Published 2026-09-23.

How severe is CVE-2026-88830?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Red Hat Hardened Images

CVE-2026-88830

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

Published 2026-09-23 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Red Hat Hardened Images

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

References

access.redhat.com/security/cve/CVE-2026-88830 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-88830?: CVE-2026-88830 is a high-severity vulnerability in Red Hat Hardened Images, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.5/10. Published 2026-09-23.
How severe is CVE-2026-88830?: High severity. CVSS v3 base score is 7.5 out of 10.