{"id":"DEBIAN-CVE-2025-67269","details":"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-\u003elength = (size_t)c - 4` without checking if the input byte `c` is less than 4. This results in an unsigned integer underflow, setting `lexer-\u003elength` 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.","modified":"2026-09-01T20:05:56.539975995Z","published":"2026-01-02T16:17:01.100Z","upstream":["CVE-2025-67269"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-67269"}],"affected":[{"package":{"name":"gpsd","ecosystem":"Debian:12","purl":"pkg:deb/debian/gpsd?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.22-4.1+deb12u1"}]}],"versions":["3.22-4.1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-67269.json"}},{"package":{"name":"gpsd","ecosystem":"Debian:13","purl":"pkg:deb/debian/gpsd?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.25-5+deb13u1"}]}],"versions":["3.25-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-67269.json"}},{"package":{"name":"gpsd","ecosystem":"Debian:14","purl":"pkg:deb/debian/gpsd?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.27.5-0.1"}]}],"versions":["3.25-5","3.26.1-1","3.27-1","3.27-1.1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-67269.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}