CVE-2025-67269
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | n/a | n/a | affected |
Weaknesses
- n/a
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing
Additional References
- https://access.redhat.com/security/cve/CVE-2025-67269
- https://bugzilla.redhat.com/show_bug.cgi?id=2426810
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-67269.json
- https://access.redhat.com/errata/RHSA-2026:0770
- https://access.redhat.com/errata/RHSA-2026:0771
References
- https://gitlab.com/gpsd/gpsd/-/commit/ffa1d6f40bca0b035fc7f5e563160ebb67199da7
- https://gitlab.com/gpsd/gpsd
- https://github.com/Jaenact/gspd_cve/blob/main/CVE-2025-67269/README.md
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