Heap Buffer Overflow in BusyBox TLS Due to Montgomery Reduction Allocation Issues
CVE-2026-88830

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Hardened Images
Vendor
CVE Published:
23 September 2026

What is CVE-2026-88830?

A flaw in the allocation process during the Montgomery reduction in BusyBox TLS can lead to a pre-authentication heap buffer overflow. This vulnerability is triggered when processing a specially crafted ClientKeyExchange message. An attacker may exploit this weakness, potentially leading to disruptive consequences for affected systems.

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.