Description
A bug in util-print.c:relts_print() in tcpdump before 4.9.0 could cause a buffer overflow in multiple protocol parsers (DNS, DVMRP, HSRP, IGMP, lightweight resolver protocol, PIM).
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 | 4.9.0-1 | — |
| Debian 13 | tcpdump | 4.9.0-1 | — |
| Debian 12 | tcpdump | 4.9.0-1 | — |
| Debian 8 | tcpdump | 4.9.0-1~deb8u1 | DSA-3775-1 |
| Debian 7 | tcpdump | 4.9.0-1~deb7u1 | DLA-809-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | tcpdump | 4.9.0-1ubuntu1~ubuntu16.04.1 | USN-3205-1 |
| Ubuntu 14.04 LTS | tcpdump | 4.9.0-1ubuntu1~ubuntu14.04.1 | USN-3205-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | tcpdump | 14:4.9.0-5.el7 | RHSA-2017:1871 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | libpcap | 1.8.1-9.1 | SUSE-SU-2017:1110-1 |
| SLES 12 SP2 | tcpdump | 4.9.0-13.1 | SUSE-SU-2017:1110-1 |
| SLES 12 SP1 | libpcap | 1.8.1-9.1 | SUSE-SU-2017:1110-1 |
| SLES 12 SP1 | tcpdump | 4.9.0-13.1 | SUSE-SU-2017:1110-1 |
| SLES 11 SP4 | tcpdump | 3.9.8-1.29.1 | SUSE-SU-2017:0656-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | libpcap | 1.8.1-9.1 | SUSE-SU-2017:1110-1 |
| SLES for SAP 12 SP2 | tcpdump | 4.9.0-13.1 | SUSE-SU-2017:1110-1 |
| SLES for SAP 12 SP1 | libpcap | 1.8.1-9.1 | SUSE-SU-2017:1110-1 |
| SLES for SAP 12 SP1 | tcpdump | 4.9.0-13.1 | SUSE-SU-2017:1110-1 |
| SLES for SAP 11 SP4 | tcpdump | 3.9.8-1.29.1 | SUSE-SU-2017:0656-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tcpdump | 4.99.1-1.2 | openSUSE-SU-2024:11425-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.23 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.22 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.21 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.20 | tcpdump | 4.9.0-r0 | — |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.18 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.17 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.16 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.15 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.14 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.13 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.12 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.11 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.10 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.9 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.8 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.7 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.6 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.5 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.4 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.3 | tcpdump | 4.9.0-r0 | — |
| Alpine v3.2 | tcpdump | 4.9.0-r0 | — |
Advisories 7
- RHSA-2017:1871 Red Hat Security Advisory: tcpdump security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-809-1 tcpdump - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3775-1 tcpdump - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3205-1 tcpdump vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:1110-1 Security update for tcpdump, libpcap 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
- SUSE-SU-2017:0656-1 Security update for tcpdump SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 1037755 vdb-entry
- DSA-3775 vendor-advisory
- RHSA-2017:1871 vendor-advisory
- https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1494526.html
- 95852 vdb-entry
- GLSA-201702-30 vendor-advisory