Description
A flaw was found in the ptp4l program of the linuxptp package. A missing length check when forwarding a PTP message between ports allows a remote attacker to cause an information leak, crash, or potentially remote code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. This flaw affects linuxptp versions before 3.1.1, before 2.0.1, before 1.9.3, before 1.8.1, before 1.7.1, before 1.6.1 and before 1.5.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | linuxptp | linuxptp 3.1.1, linuxptp 2.0.1, linuxptp 1.9.3, linuxptp 1.8.1, linuxptp 1.7.1, linuxptp 1.6.1, linuxptp 1.5.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linuxptp | 3.1-2.1 | — |
| Debian 13 | linuxptp | 3.1-2.1 | — |
| Debian 12 | linuxptp | 3.1-2.1 | — |
| Debian 10 | linuxptp | 1.9.2-1+deb10u1 | DSA-4938-1 |
| Debian 9 | linuxptp | 1.8-1+deb9u1 | DLA-2723-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | linuxptp | 1.9.2-1ubuntu0.1 | USN-6097-1 |
| Ubuntu 18.04 LTS | linuxptp | 1.8-1ubuntu0.1 | USN-6097-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | linuxptp | 1.6-1ubuntu0.1~esm1 | USN-6097-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | linuxptp | 2.0-5.el8_4.1 | RHSA-2021:2660 |
| RHEL 7 | linuxptp | 2.0-2.el7_9.1 | RHSA-2021:2658 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | linuxptp | 2.0-4.el8_2.1 | RHSA-2021:2657 |
| RHEL 8.1 EUS | linuxptp | 2.0-4.el8_1.1 | RHSA-2021:2659 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | linuxptp | 2.0-5.el8_4.1 | RLSA-2021:2660 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | linuxptp | 3.1.1-3.3.1 | SUSE-SU-2021:3202-1 |
| SLES 15 SP2 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLES 15 SP1 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLES 15 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLES 12 SP5 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2545-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SLES 12 SP3 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SLES 12 SP2 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SLES for SAP 15 SP1 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLES for SAP 15 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLES for SAP 12 SP5 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2545-1 |
| SLES for SAP 12 SP4 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SLES for SAP 12 SP3 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SLE HPC 15 SP1 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SLE HPC 15 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SUSE OpenStack Cloud Crowbar 9 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SUSE OpenStack Cloud Crowbar 8 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SUSE OpenStack Cloud 9 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SUSE OpenStack Cloud 8 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SUSE Manager Server 4.0 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SUSE Manager Retail Branch Server 4.0 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SUSE Manager Proxy 4.0 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
| SUSE HPE Helion OpenStack 8 | linuxptp | 1.4-15.3.1 | SUSE-SU-2021:2443-1 |
| SUSE Enterprise Storage 6 | linuxptp | 1.8+git65.g303b08c-3.3.1 | SUSE-SU-2021:2472-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | linuxptp | 3.1.1-3.3.1 | openSUSE-SU-2021:3202-1 |
| openSUSE Leap 15.2 | linuxptp | 1.8+git65.g303b08c-lp152.4.3.1 | openSUSE-SU-2021:1102-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | linuxptp | 2.0-2.amzn2.1 | ALAS2-2021-1697 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | linuxptp | 2.0-5.el8_4.1 | ELSA-2021-2660 |
| Oracle Linux 7 | linuxptp | 2.0-2.el7_9.1 | ELSA-2021-2658 |
Advisories 17
- RHSA-2021:2658 Red Hat Security Advisory: linuxptp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6097-1 linuxptp vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4938-1 linuxptp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2723-1 linuxptp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:2660 Important: linuxptp security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2021:2545-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3202-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1102-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3202-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2443-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2472-1 Security update for linuxptp SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2021:2660 Red Hat Security Advisory: linuxptp security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:2659 Red Hat Security Advisory: linuxptp security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:2657 Red Hat Security Advisory: linuxptp security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ALAS2-2021-1697 Important: linuxptp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 5, 2021
- ELSA-2021-2660 Important: linuxptp security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 7, 2021
- ELSA-2021-2658 Important: linuxptp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 7, 2021
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1966240
- DSA-4938 vendor-advisory
- FEDORA-2021-1b42c2f458 vendor-advisory
- FEDORA-2021-a5b584004c vendor-advisory
- [debian-lts-announce] 20210731 [SECURITY] [DLA 2723-1] linuxptp security update mailing-list