CVE catalog
CVE-2023-26555
Security update for ntp
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.52% · Oct 25, 2026
praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be complex, e.g., with a manipulated GPS receiver.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-1 | vulnerable |
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-2-hurd.1 | vulnerable |
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-2~1.2.1+dfsg1-7+hurd.1 | vulnerable |
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-2~1.2.1+dfsg1-8+hurd.1 | vulnerable |
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-2~1.2.2+dfsg1-2+hurd.1 | vulnerable |
| Debian | ntp | 11 | 1:4.2.8p15+dfsg-2~hurd.1 | vulnerable |
| Suse | ntp | linux enterprise module for legacy 15 sp4 | 4.2.8p17-150000.4.25.1 | fixed |
| Suse | ntp | linux enterprise module for legacy 15 sp5 | 4.2.8p17-150000.4.25.1 | fixed |
| Opensuse | ntp | leap 15.4 | 4.2.8p17-150000.4.25.1 | fixed |
| Opensuse | ntp | leap 15.5 | 4.2.8p17-150000.4.25.1 | fixed |
| Opensuse | ntp | tumbleweed | 4.2.8p17-1.1 | fixed |
| Ubuntu | ntp | pro | 1:4.2.8p12+dfsg-3ubuntu2 | vulnerable |
| Ubuntu | ntp | pro | 1:4.2.8p12+dfsg-3ubuntu3 | vulnerable |
| Ubuntu | ntp | pro | 1:4.2.8p12+dfsg-3ubuntu4 | vulnerable |
| Ubuntu | ntp | pro | 1:4.2.8p12+dfsg-3ubuntu4.20.04.1 | vulnerable |
| Ubuntu | ntp | pro | 1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.6.p5+dfsg-3ubuntu8 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.6.p5+dfsg-3ubuntu8.1 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.6.p5+dfsg-3ubuntu9 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu1 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu2 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu3 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu4 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.1 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.2 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.3 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.4 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.5 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.6 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.7 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.8 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.9 | vulnerable |
| Ubuntu | ntp | 16.04 | 1:4.2.8p4+dfsg-3ubuntu5.10 | vulnerable |
| Ubuntu | ntp | 22.04 | 1:4.2.8p12+dfsg-3ubuntu6 | vulnerable |
| Ubuntu | ntp | 22.04 | 1:4.2.8p15+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | ntp | 22.04 | 1:4.2.8p15+dfsg-1ubuntu2 | vulnerable |
| Suse | ntp | linux enterprise server 12 sp5 | 4.2.8p17-103.1 | fixed |
| Suse | ntp | linux enterprise server for sap applications 12 sp5 | 4.2.8p17-103.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Suse | ntp | rpm | linux enterprise module for legacy 15 sp4 | 4.2.8p17-150000.4.25.1 | Not reported | SUSE-SU-2023:2608-1 | Not reported |
| Suse | ntp | rpm | linux enterprise module for legacy 15 sp5 | 4.2.8p17-150000.4.25.1 | Not reported | SUSE-SU-2023:2608-1 | Not reported |
| Opensuse | ntp | rpm | leap 15.4 | 4.2.8p17-150000.4.25.1 | Not reported | SUSE-SU-2023:2608-1 | Not reported |
| Opensuse | ntp | rpm | leap 15.5 | 4.2.8p17-150000.4.25.1 | Not reported | SUSE-SU-2023:2608-1 | Not reported |
| Opensuse | ntp | rpm | tumbleweed | 4.2.8p17-1.1 | Not reported | OPENSUSE-SU-2024:12997-1 | Not reported |
| Suse | ntp | rpm | linux enterprise server 12 sp5 | 4.2.8p17-103.1 | Not reported | SUSE-SU-2023:2609-1 | Not reported |
| Suse | ntp | rpm | linux enterprise server for sap applications 12 sp5 | 4.2.8p17-103.1 | Not reported | SUSE-SU-2023:2609-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2023_2608-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-26555]
- [https://osv.dev/vulnerability/SUSE-SU-2023:2608-1]
- [https://osv.dev/vulnerability/SUSE-SU-2023:2609-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-26555]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:12997-1]
[FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]