2.2
Low
CVE-2026-18839 Popt-devel: popt-static: size_t underflow in singleoptionhelp
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.
CVSS 3.1 detail
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:LExploitable with local access to the machine, with an ordinary account and if a user takes an action; the impact on data or service is limited.
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- Interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Hardened Images 1.19 | earliest → < 1.19-11.2.hum1 | 1.19-11.2.hum1 |
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| popt 1.13 | 1.13 → latest | No fix stated |
| Red Hat OpenShift AI (RHOAI) | Versions not published |
Show the other branch Hide the other branch
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift Container Platform 5 | Versions not published |
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