Integer Underflow (Wrap or Wraparound) Affecting ntpsec/gpsd package, versions [2.35,3.27.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-NTPSECGPSD-14860876
- published5 Jan 2026
- disclosed2 Jan 2026
- creditJaehyun Lee
Introduced: 2 Jan 2026
CVE-2025-67269 (opens in a new tab)How to fix?
Upgrade ntpsec/gpsd to version 3.27.1 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the NAVCOM packet parsing process. An attacker can cause the service to excessively consume CPU and become unresponsive by sending a specially crafted NAVCOM packet that causes an unsigned integer to be used during packet length calculation, leading to a non-terminating read state.
Note: This vulnerability can be exploited both over the network if gpsd is listening on a network port, or locally if the attacker has access to a serial device fed into gpsd.