CVE-2025-67269
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | n/a |
| Product | n/a |
| Published | Jan 2, 2026 |
| Last Updated | Jun 30, 2026 |
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Affected Versions
n/a / n/a
n/a
References
gitlab.com: https://gitlab.com/gpsd/gpsd/-/commit/ffa1d6f40bca0b035fc7f5e563160ebb67199da7 gitlab.com: https://gitlab.com/gpsd/gpsd github.com: https://github.com/Jaenact/gspd_cve/blob/main/CVE-2025-67269/README.md access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-67269 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2426810 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-67269.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:0770 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:0771