Popt-devel: popt-static: size_t underflow in singleoptionhelp
Priority LOW 11CWE-191Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 1 fixed, 8 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00126 2nd percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 8 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| rpm-software-management | popt | 1.13 and later | — | No fix listed | CNA |
| Red Hat | Red Hat Hardened Images | — | 1.19-11.2.hum1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — | No fix listed | CNA |
- popt Vendorrpm-software-management Affected 1.13 and later Fixed in — No fix listed CNA
- Red Hat Hardened Images VendorRed Hat Affected — Fixed in 1.19-11.2.hum1 Patch available CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift AI (RHOAI) VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 5 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:hummingbird:1 | 1 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:10 | 10 | — | Red Hat |
| cpe:/o:redhat:rhel_els:6 | 6 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8 | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9 | 9 | — | Red Hat |
| cpe:/a:redhat:openshift_ai | — | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
| cpe:/a:redhat:openshift:5 | 5 | — | Red Hat |
- cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
- cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat
- cpe:/a:redhat:openshift_ai Versions — — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
- cpe:/a:redhat:openshift:5 Versions 5 — ·Red Hat
Remediation
Red Hat 1 advisory
- RHSA-2026:77932 Released 2026-10-07 · Red Hat rating LowRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images popt-1.19-11.2.hum1@aarch64, popt-1.19-11.2.hum1@s390x, popt-1.19-11.2.hum1@src +7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | — |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | — |
| Red Hat OpenShift AI (RHOAI) | Affected | — |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
| Red Hat Hardened Images | Fixed | RHSA-2026:77932 |
Not affected: 1 product
- Red Hat OpenShift AI (RHOAI)
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18839
- 2026-10-03 Alias added: GHSA-8fjx-p4xg-vgp8
- 2026-10-08 Fix available: [email protected] · CNA
- 2026-10-08 1 new reference · CNA
- 2026-10-09 Fix available: RHSA-2026:77932 · Red Hat
- 2026-10-09 Fix available: Red Hat Hardened Images · Red Hat
- 2026-11-06 Affected versions changed · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
More rpm-software-management vulnerabilities
- TI-2023-05870 Mock: privilege escalation for users that can access mock configuration CVSS 3.1CRITICAL 9.8
- TI-2024-01797 Uncontrolled resource consumption in Fedora dnf5daemon-server CVSS 3.1MEDIUM 6.5
- TI-2026-15357 Popt-devel: popt-static: off-by-one in poptstuffargs CVSS 3.1LOW 2.5
- TI-2026-15359 Popt-devel: popt-static: short realloc in poptconfigfiletostring CVSS 3.1LOW 2.5
Sources
- CVE-2026-18839 · CVE Program
- CVE-2026-18839 · NVD
- FIRST EPSS
- GHSA-8fjx-p4xg-vgp8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-18839 · Red Hat security data · CC BY 4.0
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