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).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rpm-software-management | popt | 1.11 | — |
| Red Hat | Red Hat Hardened Images | — | — |
| 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 AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | popt | 1.19+dfsg-3 | — |
| Debian 13 | popt | No fix yet | — |
| Debian 12 | popt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | popt | No fix yet | — |
| Ubuntu 26.04 LTS | popt | No fix yet | — |
| Ubuntu 24.04 LTS | popt | No fix yet | — |
| Ubuntu 22.04 LTS | popt | No fix yet | — |
| Ubuntu 20.04 LTS | popt | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | popt | No fix yet | — |
| Ubuntu 16.04 LTS | popt | No fix yet | — |
| Ubuntu 14.04 LTS | popt | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | popt +2 | 1.19-11.1.hum1 | RHSA-2026:56984 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | popt | 1.19-2 | — |
| Azure Linux 3 | rsync | 3.5.1-1 | — |
Advisories 1
- RHSA-2026:56984 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 6, 2026
References
- RHSA-2026:56984 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-18743 vdb-entry
- RHBZ#2510809 issue-tracking