# CVE-2023-41910: lldpd: LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP

CVE-2023-41910 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-41910, released September 5, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-41910
- Priority: High
- CVSS: 9.8 (Moderate)
- EPSS: 0.0115
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 5, 2023

## Description

LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.  Security Fix(es):  * lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)  * lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)  * lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.5 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lldpd Debian 11.6 (bullseye) | 1.0.11-1+deb11u2 | [DSA-5505-1](https://patchblox.com/security/data/fix/linux/dsa-5505-1.md) | Sep 25, 2023 |
| Linux | lldpd Debian 12.15 (bookworm) | 1.0.16-1+deb12u1 | [DSA-5505-1](https://patchblox.com/security/data/fix/linux/dsa-5505-1.md) | Sep 25, 2023 |
| Linux | lldpd Debian 13.5 (trixie) | 1.0.17-1 | [DEBIAN-CVE-2023-41910](https://patchblox.com/security/data/fix/linux/debian-cve-2023-41910.md) | Sep 5, 2023 |
| Linux | lldpd Debian 14 | 1.0.17-1 | [DEBIAN-CVE-2023-41910](https://patchblox.com/security/data/fix/linux/debian-cve-2023-41910.md) | Sep 5, 2023 |
| Linux | lldpd RHEL 9 | 0:1.0.18-4.el9 | [RHSA-2024:9158](https://patchblox.com/security/data/fix/linux/rhsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd almalinux 9 | 1.0.18-4.el9 | [ALSA-2024:9158](https://patchblox.com/security/data/fix/linux/alsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd ol 9 | 0:1.0.18-4.el9 | [ELSA-2024-9158](https://patchblox.com/security/data/fix/linux/elsa-2024-9158.md) | Nov 14, 2024 |
| Linux | lldpd rocky 9 | 0:1.0.18-4.el9 | [RLSA-2024:9158](https://patchblox.com/security/data/fix/linux/rlsa-2024-9158.md) | Mar 17, 2025 |
| Linux | lldpd-devel RHEL 9 | 0:1.0.18-4.el9 | [RHSA-2024:9158](https://patchblox.com/security/data/fix/linux/rhsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd-devel almalinux 9 | 1.0.18-4.el9 | [ALSA-2024:9158](https://patchblox.com/security/data/fix/linux/alsa-2024-9158.md) | Nov 12, 2024 |
| Linux | lldpd-devel ol 9 | 0:1.0.18-4.el9 | [ELSA-2024-9158](https://patchblox.com/security/data/fix/linux/elsa-2024-9158.md) | Nov 14, 2024 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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