CVE Watch15 jul 2026

CVE-2025-67269

An integer underflow vulnerability exists in the `nextstate()` function in `gpsd/packet.c` of gpsd versions prior to commit `ffa1d6f40bca0b0

CVSS

7.5

Alto

EPSS

0.5%

p38

KEV

—

Exploit Today

0-100

Publicado: 2 ene 2026 · Última mod.: 15 jul 2026 · CWE-191

EPSS · 30d

0.5%EPSS · 30 días0.5%

2026-06-302026-07-17

Descripción técnica

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.

Referencias oficiales

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