Stack-based Buffer Overflow Affecting libwebsockets package, versions [0,]
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-CONAN-LIBWEBSOCKETS-13645010
- published21 Oct 2025
- disclosed20 Oct 2025
- creditUnknown
Introduced: 20 Oct 2025
NewCVE-2025-11678 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the lws_adns_parse_label function when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation. An attacker can execute arbitrary code or cause a crash by crafting a malicious DNS response with a label longer than the allowed maximum that matches a sniffed DNS request id.
Note:
This is only exploitable if the LWS_WITH_SYS_ASYNC_DNS compilation flag is enabled.