CVE-2025-67269 Affecting gpsd package, versions <3.27.5-0.1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.55% (44th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-GPSD-14849373
  • published3 Jan 2026
  • disclosed2 Jan 2026

Introduced: 2 Jan 2026

CVE-2025-67269  (opens in a new tab)

How to fix?

Upgrade Debian:unstable gpsd to version 3.27.5-0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gpsd package and not the gpsd package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

An integer underflow vulnerability exists in the nextstate() function in gpsd/packet.c of gpsd versions prior to commit ffa1d6f40bca0b035fc7f5e563160ebb67199da7. When parsing a NAVCOM packet, the payload length is calculated using lexer-&gt;length = (size_t)c - 4 without checking if the input byte c is less than 4. This results in an unsigned integer underflow, setting lexer-&gt;length to a very large value (near SIZE_MAX). The parser then enters a loop attempting to consume this massive number of bytes, causing 100% CPU utilization and a Denial of Service (DoS) condition.

CVSS Base Scores

version 3.1