What is CVE-2026-18727?

CVE-2026-18727 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Integer Underflow. CVSS score: 6.5/10. Published 2026-08-12.

How severe is CVE-2026-18727?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Red Hat Enterprise Linux 10

CVE-2026-18727

A flaw was found in open-iscsi's iscsiuio component. This vulnerability involves an integer underflow and out-of-bounds read during Dynamic Host Configuration Protocol for IPv6 (DHCPv6) packet parsing. Specifically, crafted DHCPv6 Advertis…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18727?: CVE-2026-18727 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Integer Underflow. CVSS score: 6.5/10. Published 2026-08-12.
How severe is CVE-2026-18727?: Medium severity. CVSS v3 base score is 6.5 out of 10.