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.

An update of the gpsd package has been released.

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:0771 advisory.

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)
      * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-0770 advisory.

    - fix buffer overflow in NMEA2000 driver (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:0770 advisory.

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)
      * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:0770 advisory.

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)

    * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-055:01 advisory.

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)
      * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a1552b48c3 advisory.

    Security fixes for  CVE-2025-67268 and CVE-2025-67269.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:0771 advisory.

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)

    * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-0771 advisory.

    [1:3.26.1-1.0.1.el9_7.1]
    - Replaced upstream reference [Orabug: 35865525]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0771 advisory.

    gpsd is a service daemon that mediates access to a GPS sensor connected to the host computer by serial or     USB interface, making its data on the location/course/velocity of the sensor available to be queried on     TCP port 2947 of the host computer.  The Red Hat support for this package is limited. See     https://access.redhat.com/support/policy/gpsd-support for more details.

    Security Fix(es):

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)

    * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0770 advisory.

    gpsd is a service daemon that mediates access to a GPS sensor connected to the host computer by serial or     USB interface, making its data on the location/course/velocity of the sensor available to be queried on     TCP port 2947 of the host computer.  With gpsd, multiple GPS client applications (such as navigational and     war-driving software) can share access to a GPS without contention or loss of data.  Also, gpsd responds     to queries with a format that is substantially easier to parse than NMEA 0183.

    Security Fix(es):

    * gpsd: gpsd: Denial of Service due to malformed NAVCOM packet parsing (CVE-2025-67269)

    * gpsd: gpsd: Arbitrary code execution via heap-based out-of-bounds write in NMEA2000 packet handling     (CVE-2025-67268)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4441 advisory.

    -lts-announce@lists.debian.org     Subject: [SECURITY] [DLA 4441-1] gpsd security update

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4441-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     January 19, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : gpsd     Version        : 3.22-4+deb11u1     CVE ID         : CVE-2025-67268 CVE-2025-67269     Debian Bug     : 1124799 1124800

    Multiple vulnerabilities were fixed in gpsd a service daemon that     monitors one or more GNSS (GPS) or AIS receivers attached to a host computer     through serial or USB ports.

    CVE-2025-67268

        gpsd contains a heap-based out-of-bounds write         vulnerability in the drivers/driver_nmea2000.c file.
        The hnd_129540 function, which handles NMEA2000 PGN 129540         (GNSS Satellites in View) packets, fails to validate the         user-supplied satellite count against the size of the skyview         array (184 elements). This allows an attacker to write beyond         the bounds of the array by providing a satellite count up         to 255, leading to memory corruption, Denial of Service (DoS),         and potentially arbitrary code execution.

    CVE-2025-67269

        An integer underflow vulnerability exists in the `nextstate()`         function in `gpsd/packet.c`.
        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.

    For Debian 11 bullseye, these problems have been fixed in version     3.22-4+deb11u1.

    We recommend that you upgrade your gpsd packages.

    For the detailed security status of gpsd please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/gpsd

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2ca69451b9 advisory.

    Security fixes for  CVE-2025-67268 and CVE-2025-67269.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7948-1 advisory.

    It was discovered that GPSd incorrectly handled processing NMEA2000 packets. An attacker could use this     issue to cause GPSd to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2025-67268)

    It was discovered that GPSd incorrectly handled processing NAVCOM packets. An attacker could possibly use     this issue to cause GPSd to consume resources, resulting in a denial of service. (CVE-2025-67269)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-67269)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
297258	Photon OS 4.0: Gpsd PHSA-2026-4.0-0947	Nessus	PhotonOS Local Security Checks	high
297250	Photon OS 5.0: Gpsd PHSA-2026-5.0-0737	Nessus	PhotonOS Local Security Checks	high
294983	AlmaLinux 9 : gpsd-minimal (ALSA-2026:0771)	Nessus	Alma Linux Local Security Checks	critical
294876	Oracle Linux 10 : gpsd (ELSA-2026-0770)	Nessus	Oracle Linux Local Security Checks	critical
294854	AlmaLinux 10 : gpsd (ALSA-2026:0770)	Nessus	Alma Linux Local Security Checks	critical
294846	RockyLinux 10 : gpsd (RLSA-2026:0770)	Nessus	Rocky Linux Local Security Checks	critical
294832	MiracleLinux 9 : gpsd-minimal-3.26.1-1.el9_7.1 (AXSA:2026-055:01)	Nessus	Miracle Linux Local Security Checks	critical
293787	Fedora 42 : gpsd (2026-a1552b48c3)	Nessus	Fedora Local Security Checks	critical
293769	RockyLinux 9 : gpsd-minimal (RLSA-2026:0771)	Nessus	Rocky Linux Local Security Checks	critical
291625	Oracle Linux 9 : gpsd-minimal (ELSA-2026-0771)	Nessus	Oracle Linux Local Security Checks	critical
291623	RHEL 9 : gpsd-minimal (RHSA-2026:0771)	Nessus	Red Hat Local Security Checks	critical
291539	RHEL 10 : gpsd (RHSA-2026:0770)	Nessus	Red Hat Local Security Checks	critical
291321	Debian dla-4441 : gpsd - security update	Nessus	Debian Local Security Checks	critical
284796	Fedora 43 : gpsd (2026-2ca69451b9)	Nessus	Fedora Local Security Checks	critical
282531	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : GPSd vulnerabilities (USN-7948-1)	Nessus	Ubuntu Local Security Checks	critical
281614	Linux Distros Unpatched Vulnerability : CVE-2025-67269	Nessus	Misc.	high

Detections

Analytics

CVE-2025-67269

high

Tenable Plugins

high

high

critical

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critical

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high