Popt-devel: popt-static: size_t underflow in singleoptionhelp
Summary
| CVE | CVE-2026-18839 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-05 21:16:57 UTC |
| Updated | 2026-11-06 19:17:47 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 2.2 LOW from [email protected]
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
EPSS: 0.001260000 probability, percentile 0.023350000 (date 2026-11-08)
Problem Types: CWE-191 | CWE-191 Integer Underflow (Wrap or Wraparound)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 2.2 | LOW | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L |
| 3.1 | CNA | CVSS | 2.2 | LOW | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
LowUser Interaction
RequiredScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
LowCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Rpm-software-management | Popt | affected 1.13 * semver | Not specified |
| CNA | Red Hat | Red Hat Hardened Images | unaffected 1.19-11.2.hum1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 6 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 5 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-18839 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:77932 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Matanya Moses (Checkpoint) for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-08-04T14:14:22.907Z | Reported to Red Hat. |
| CNA | 2026-08-05T18:56:50.736Z | Made public. |
Workarounds
CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
There are currently no legacy QID mappings associated with this CVE.