Description
In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.
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 | tcpdump | No fix yet | — |
| Debian 13 | tcpdump | No fix yet | — |
| Debian 12 | tcpdump | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | tcpdump | 4.9.3-0ubuntu0.18.04.1 | USN-4252-1 |
| Ubuntu 16.04 LTS | tcpdump | 4.9.3-0ubuntu0.16.04.1 | USN-4252-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | tcpdump | 4.9.3-0ubuntu0.14.04.1+esm1 | USN-4252-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | tcpdump | 14:4.9.2-6.el8 | RHSA-2020:1604 |
| RHEL 7 | tcpdump | 14:4.9.2-4.el7_7.1 | RHSA-2019:3976 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | tcpdump | 4.9.2-3.3.1 | SUSE-SU-2018:4131-1 |
| SLES 12 SP4 | tcpdump | 4.9.2-14.8.1 | SUSE-SU-2018:4149-1 |
| SLES 12 SP3 | tcpdump | 4.9.2-14.8.1 | SUSE-SU-2018:4149-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | tcpdump | 4.9.2-14.8.1 | SUSE-SU-2018:4149-1 |
| SLES for SAP 12 SP3 | tcpdump | 4.9.2-14.8.1 | SUSE-SU-2018:4149-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tcpdump | 4.99.1-1.2 | openSUSE-SU-2024:11425-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | tcpdump | 14:4.9.2-4.amzn2.1 | ALAS2-2020-1385 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | tcpdump | 14:4.9.2-6.el8 | ELSA-2020-1604 |
| Oracle Linux 7 | tcpdump | 14:4.9.2-4.el7_7.1 | ELSA-2019-3976 |
Advisories 11
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2019:3976 Red Hat Security Advisory: tcpdump security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4252-1 tcpdump vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-4252-2 tcpdump vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:4131-1 Security update for tcpdump SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4149-1 Security update for tcpdump SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11425-1 tcpdump-4.99.1-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:1604 Red Hat Security Advisory: tcpdump security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ELSA-2020-1604 Low: tcpdump security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
- ALAS2-2020-1385 Low: tcpdump security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 17, 2020
- ELSA-2019-3976 Low: tcpdump security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 27, 2019
References
- 106098 vdb-entry
- https://github.com/zyingp/temp/blob/master/tcpdump.md
- FEDORA-2019-85d92df70f vendor-advisory
- FEDORA-2019-d06bc63433 vendor-advisory
- FEDORA-2019-6db0d5b9d9 vendor-advisory
- RHSA-2019:3976 vendor-advisory
- USN-4252-2 vendor-advisory
- USN-4252-1 vendor-advisory
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44516