Red HatCVE-2026-18743
Red Hat popt. This vulnerability: memory corruption
Low2.5CVE-2026-18743 · Published Sep 1, 2026 · updated Sep 8, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
| all versions | No fix yet | |
| popt Product | <= 1.11 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-131
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 1 | Red Hat Ansible Automation Platform: missing authorization | Medium6.4 | No fix yet |
| Sep 1 | Red Hat SFTP backend: uninitialized resource | Medium4.3 | 1.60.2 |
| Sep 1 | Red Hat SFTP backend: denial of service | High8.8 | 1.60.2 |
| Sep 1 | Red Hat AFP backend: denial of service | Medium6.5 | 1.60.2 |
| Sep 1 | Red Hat MTP backend: denial of service | Medium4.3 | 1.60.2 |
| Sep 1 | Red Hat pulpcore: cross-site scripting | Medium5.4 | No fix yet |