Use After Free Affecting qt/qtbase package, versions [6.9.0-beta1,6.9.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-QTQTBASE-10674339
- published10 Jul 2025
- disclosed11 Jun 2025
- creditUnknown
Introduced: 11 Jun 2025
CVE-2025-5991 (opens in a new tab)How to fix?
Upgrade qt/qtbase to version 6.9.1 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free via the QHttp2ProtocolHandler function. An attacker can execute arbitrary code or cause a denial of service by exploiting a race condition between the HTTP body and error response handling.
Note: This is only exploitable if HTTP/2 requests are being processed.