Red HatCVE-2026-18739
Red Hat popt: code execution
Low2.5CVE-2026-18739 · Published Aug 4, 2026 · updated Aug 31, 2026
A flaw was found in popt, a command-line option parsing library. An off-by-one error in the poptStuffArgs function, when repeatedly called by a host application or through deep alias nesting, can lead to corruption of internal program data. This corruption could potentially enable a local attacker to execute arbitrary code if the host application then unsafely processes the altered data.
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 OpenShift Container Platform 4 Product | all versions | No fix yet |
| all versions | No fix yet | |
| popt Product | <= 1.1.1 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-787
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 4 | Red Hat SSSD: out-of-bounds read | Medium5.5 | No fix yet |
| Aug 4 | Red Hat Enterprise Linux 10: server-side request forgery | Medium5.4 | 5.80 |
| Aug 4 | Red Hat Enterprise Linux 10: out-of-bounds read | Medium6.5 | 5.80 |
| Aug 4 | Red Hat Build of Keycloak: improper signature check | Low3.7 | No fix yet |
| Aug 4 | Red Hat SSSD: uninitialized resource | Low3.3 | No fix yet |
| Aug 4 | Red Hat Enterprise Linux: heap buffer overflow | High7.3 | No fix yet |