Red HatCVE-2026-18839
Red Hat Enterprise Linux 10: integer overflow
Low2.2CVE-2026-18839 · Published Aug 5, 2026 · updated Sep 1, 2026
An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.
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 Hardened Images 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 | <= 1.13 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-191
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 5 | Red Hat RPM: buffer overflow | Medium5.5 | No fix yet |
| Aug 5 | Red Hat OpenShift Container Platform 4: authentication bypass | Medium6.5 | No fix yet |
| Aug 5 | Red Hat SAML broker: origin validation error | High7.4 | No fix yet |
| Aug 5 | Red Hat Keycloak: type confusion | High8.8 | No fix yet |
| Aug 5 | Red Hat LDAP storage provider of Keycloak: improper privilege management | Medium5.4 | No fix yet |
| Aug 5 | Red Hat user-event metrics recording of Keycloak.: resource exhaustion | Medium6.5 | No fix yet |