CVE-2026-114458
CVE-2026-114458 · Mod_qos: undersized connection-monitor scratch array permits heap buffer overflow
This page contains facts from public vulnerability sources. Check the original advisory before updating.
A flaw was found in mod_qos. An unauthenticated remote attacker can cause a Denial of Service (DoS) by maintaining numerous concurrent low-rate connections to a target server. When connection rate monitoring is active, the module fails to verify array boundaries when recording client IP addresses, allowing more connection records to be added than the allocated buffer can hold. This issue leads to heap memory corruption, which can crash the web server process.
CVSS 5.9 · Medium · EPSS 0.3%
- Published
- Updated
Stack: system
Affected products and versions
mod_qos
- Versions
- 11.74: Affected (custom)
- 11.76: Affected (custom)
- 11.79: Affected (custom)
No fix published
mod-qos Debian:14
- Versions
- 11.76-3
- 11.76-4
- 11.76-5
- 11.76-6
- 11.77-1
- 11.78-1
- 11.79-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mod-qos Ubuntu:26.10
- Versions
- 11.77-1
- 11.78-1
- 11.79-1
- 11.79-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mod-qos Ubuntu:26.04:LTS
- Versions
- 11.76-4
- 11.76-5
- 11.76-6
- 11.77-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published