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CVE-2025-67269 An integer underflow vulnerability exists in the `nextstate()` function in `gpsd/packet.c` of gpsd versions prior to…

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.

Produits et versions touchés

Produit Versions touchées Corrigé en
n/a Versions non publiées
Red Hat Enterprise Linux AppStream (v. 10) Versions non publiées
Red Hat Enterprise Linux AppStream (v. 9) Versions non publiées
Red Hat Enterprise Linux 10 Versions non publiées
Red Hat Enterprise Linux 9 Versions non publiées

Références

Chronologie

  1. Publiée
  2. Dernière modification

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