CVE-2026-18321

A flaw was found in NTPsec. A local attacker could exploit a buffer overflow vulnerability in the Zyfer refclock component, leading to the ntpd daemon crashing. This could result in a denial of service DoS, making the network time synchronization service unavailable...

SUSE CVE-2026-18321

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

UBUNTU-CVE-2026-18321

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

CVE-2026-18321

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

CVE-2026-18321

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

CVE-2026-18321 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

CVE-2026-18321 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in ntpsec

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

CVE-2026-18321

CVE-2026-18321 describes a buffer overflow in NTPsec’s Zyfer refclock that can crash ntpd via a local attack. The CVE is listed as a classic buffer overflow (Buffer Copy without Checking Size of Input) affecting ntpsec, but the provided documents do not specify affected versions, exact vulnerable...

CVE-2026-18321

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd...

Linux Distros Unpatched Vulnerability : CVE-2026-18321

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd CVE-2026-18321 Note that Nessus relies on the presence of the package as reported...

Astra Linux – Vulnerability in NTP

The praecisparse function in ntpd/refclockpalisade.c, within NTP 4.2.8p15, contains an out-of-bounds write vulnerability. Any attack method would be complex, for example, using a manipulated GPS receiver...

SUSE-SU-2025:20862-1 Security update for chrony

This update for chrony fixes the following issues: - Update to version 4.8: Add maxunreach option to limit selection of unreachable sources Add -u option to chronyc to drop root privileges default chronyc user is set by configure script Fix refclock extpps option to work on Linux = 6.15 Validate...

Security update for chrony

This update for chrony fixes the following issues: Update to version 4.8: Add maxunreach option to limit selection of unreachable sources Add -u option to chronyc to drop root privileges default chronyc user is set by configure script Fix refclock extpps option to work on Linux = 6.15 Validate...

SUSE-SU-2025:20846-1 Security update for chrony

This update for chrony fixes the following issues: - Update to version 4.8: Add maxunreach option to limit selection of unreachable sources Add -u option to chronyc to drop root privileges default chronyc user is set by configure script Fix refclock extpps option to work on Linux = 6.15 Validate...

Security update for chrony

This update for chrony fixes the following issues: Update to version 4.8: Add maxunreach option to limit selection of unreachable sources Add -u option to chronyc to drop root privileges default chronyc user is set by configure script Fix refclock extpps option to work on Linux = 6.15 Validate...

EUVD-2017-15508

Malware in sbrugna...

Multiple NTP vulnerabilities resolved (CVE-2023-26551, CVE-2023-26552, CVE-2023-26553, CVE-2023-26554, CVE-2023-26555)

CVE-2023-26551 mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cpcpdec while loop. An adversary may be able to attack a client ntpq process, but cannot attack ntpd. Base Score: 5.6 MEDIUM Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2023-26552 mstolfp in...

Fedora: Security Advisory for ntp-refclock (FEDORA-2023-611a143d5f)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[SECURITY] Fedora 38 Update: ntp-refclock-0.6-1.fc38

ntp-refclock is a wrapper for reference clock drivers included in the ntpd daemon, which enables other NTP implementations to use the supported hardware reference clocks for synchronization of the system clock. It provides a minimal environment for the drivers to be able to run in a separate...

[SECURITY] Fedora 37 Update: ntp-refclock-0.6-1.fc37

ntp-refclock is a wrapper for reference clock drivers included in the ntpd daemon, which enables other NTP implementations to use the supported hardware reference clocks for synchronization of the system clock. It provides a minimal environment for the drivers to be able to run in a separate...