Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-18743
rpm-software-management popt — Popt-devel: popt-static: short realloc in poptconfigfiletostring
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U N N L 2.5 .0014 2.9 —
AFFECTED
Product Versions Fixed
popt 1.11 – —
Red Hat Hardened Images unspecified 1.19-11.1.hum1
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
Red Hat OpenShift Container Platform 4 unspecified —
TIMELINE
Aug 3 Reserved by redhat
Sep 1 Published (CNA: redhat)
Sep 8 PATCH SHIPPED — CVE-2026-18743 (rpm-software-management popt). Fixed in Red Hat Hardened Images 1.19-11.1.hum1.
Description
A flaw was found in popt. This vulnerability allows an attacker to provide specially crafted configuration content to a host, which, when loaded, can lead to a small memory corruption issue. This occurs because of an error in how the `poptConfigFileToString` function reallocates memory for buffers. Successful exploitation could result in heap metadata corruption, potentially causing the affected process to become unavailable (denial of service).
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 3, 2026 | Reserved | Reserved by redhat |
| September 1, 2026 | Published | Published (CNA: redhat) |
| September 8, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-18743 (rpm-software-management popt). Fixed in Red Hat Hardened Images 1.19-11.1.hum1. |
Affected
Affected products and packages — 9 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| rpm-software-management | popt | — | 1.11 | — |
| Red Hat | Red Hat Hardened Images | — | — | 1.19-11.1.hum1 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-18743 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
