Description
Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.
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 | lldpd | 0.7.19-1 | — |
| Debian 14 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-1 | — |
| Debian 13 | lldpd | 0.7.19-1 | — |
| Debian 13 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-1 | — |
| Debian 12 | lldpd | 0.7.19-1 | — |
| Debian 12 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-1 | — |
| Debian 10 | openvswitch | 2.10.6+ds1-0+deb10u1 | DSA-4836-1 |
| Debian 9 | openvswitch | 2.6.10-0+deb9u1 | DLA-2571-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openvswitch | 2.13.1-0ubuntu0.20.04.3 | USN-4691-1 |
| Ubuntu 18.04 LTS | openvswitch | 2.9.7-0ubuntu0.18.04.2 | USN-4691-1 |
| Ubuntu 16.04 LTS | openvswitch | 2.5.9-0ubuntu0.16.04.2 | USN-4691-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | openvswitch2.11 +4 | 2.11.3-74.el8fdp | RHBA-2020:5311 |
| RHEL 8 | openvswitch2.13 +4 | 2.13.0-71.el8fdp | RHBA-2020:5310 |
| RHEL 7 | openvswitch +3 | 2.9.9-1.el7fdp | RHSA-2021:2077 |
| RHEL 7 | openvswitch2.11 +3 | 2.11.3-77.el7fdp | RHSA-2021:0028, RHBA-2020:5307 |
| RHEL 7 | openvswitch2.13 +3 | 2.13.0-62.el7fdp | RHBA-2020:5306 |
| RHEL 7 | ovn2.11 +2 | 2.11.1-56.el7fdp | RHSA-2021:0028 |
| RHEL 7 | redhat-virtualization-host +1 | 4.3.12-20201216.0.el7_9 | RHSA-2021:0028 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Manager 4 | openvswitch2.11 +2 | 2.11.3-77.el7fdp | RHSA-2021:0028 |
| Red Hat Rhev Manager 4 | ovn2.11 +2 | 2.11.1-56.el7fdp | RHSA-2021:0028 |
| Red Hat Rhev Hypervisor 4 | cockpit-ovirt +1 | 0.14.15-1.el8ev | RHSA-2020:5611 |
| Red Hat Rhev Hypervisor 4 | redhat-virtualization-host +1 | 4.4.3-20201210.0.el8_3 | RHSA-2020:5611 |
| Red Hat Rhev Hypervisor 4 | rhvm-appliance | 2:4.4-20210310.0.el8ev | RHSA-2021:0988 |
| Red Hat OpenStack 13 | openvswitch-selinux-extra-policy | 1.0-17.el7fdp | RHSA-2021:0931 |
| Red Hat OpenStack 13 | openvswitch2.11 +3 | 2.11.3-77.el7fdp | RHSA-2021:0931 |
| Red Hat OpenStack 13 | ovn2.11 +3 | 2.11.1-57.el7fdp | RHSA-2021:0931 |
| Red Hat OpenStack 10 | openvswitch +3 | 2.9.9-1.el7fdp | RHSA-2021:2205 |
| Red Hat OpenShift 4 | openvswitch2.13 +4 | 2.13.0-72.el8fdp | RHSA-2020:5615 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.23 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.22 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.21 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.20 | openvswitch | 2.12.2-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.18 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.17 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.16 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.15 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.14 | openvswitch | 2.12.2-r0 | — |
| Alpine v3.13 | openvswitch | 2.12.2-r0 | — |
Advisories 16
- RHSA-2020:5611 Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2021:2077 Red Hat Security Advisory: openvswitch security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- RHSA-2021:0988 Red Hat Security Advisory: rhvm-appliance security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2021:2205 Red Hat Security Advisory: Red Hat OpenStack Platform 10.0 (openvswitch) security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:0931 Red Hat Security Advisory: openvswitch2.11 and ovn2.11 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:0028 Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5615 Red Hat Security Advisory: OpenShift Container Platform 4.6.9 packages and security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHBA-2020:5311 Red Hat Bug Fix Advisory: openvswitch2.11 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHBA-2020:5310 Red Hat Bug Fix Advisory: openvswitch2.13 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHBA-2020:5306 Red Hat Bug Fix Advisory: openvswitch2.13 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHBA-2020:5307 Red Hat Bug Fix Advisory: openvswitch2.11 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4691-1 openvswitch vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4836-1 openvswitch - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2571-1 openvswitch - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SSA-941426 SSA-941426: Multiple LLDP Vulnerabilities in Industrial Products Siemens ProductCERT · Mar 14, 2023
- ICSA-21-194-07 Siemens Industrial Products LLDP (Update D) CISA ICS & IT advisories · Mar 14, 2023
References
- http://www.openwall.com/lists/oss-security/2015/10/16/2
- http://www.openwall.com/lists/oss-security/2015/10/30/2
- https://github.com/vincentbernat/lldpd/commit/dd4f16e7e816f2165fba76e3d162cd8d2978dcb2
- DSA-4836 vendor-advisory
- [debian-lts-announce] 20210219 [SECURITY] [DLA 2571-1] openvswitch security update mailing-list
- FEDORA-2021-fba11d37ee vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07