CVE-2026-114458
Mod_qos: undersized connection-monitor scratch array permits heap buffer overflow
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | pbuchbinder |
| Product | mod_qos |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
pbuchbinder / mod_qos
11.74 11.76 11.79
References
Credits
Red Hat would like to thank Robin "drzobin" Larsson for reporting this issue.