Mod_qos: undersized connection-monitor scratch array permits heap buffer overflow
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.
CVE-2026-114458
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-114458
mod_qos
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "pbuchbinder",
"product": "mod_qos",
"versions": [
{
"status": "affected",
"version": "11.74",
"versionType": "custom"
},
{
"status": "affected",
"version": "11.76",
"versionType": "custom"
},
{
"status": "affected",
"version": "11.79",
"versionType": "custom"
}
],
"packageName": "mod_qos",
"collectionURL": "https://svn.code.sf.net/p/mod-qos/source/",
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-114458
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #50137 · Revision 1
- Added to Heist Feed
- Publisher date