Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rpm-software-management | popt | 1.13 | — |
| 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 | 1.19-11.2.hum1 | RHSA-2026:77932 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | popt +1 | No fix yet | — |
Advisories 1
- RHSA-2026:77932 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
References
- RHSA-2026:77932 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-18839 vdb-entry
- RHBZ#2511010 issue-tracking