VULNERABILITY INTELLIGENCE
CVE-2025-67269
CVSS score7.5 HIGH
EPSS probability0.56%
CISA KEVNot currently listed
Published2026-01-02
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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->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->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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-191
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-191