CVE-2023-41910

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-05 · updated 2026-06-17
Weakness: CWE-125

Description

An issue was discovered in lldpd before 1.0.17. By crafting a CDP PDU packet with specific CDP_TLV_ADDRESSES TLVs, a malicious actor can remotely force the lldpd daemon to perform an out-of-bounds read on heap memory. This occurs in cdp_decode in daemon/protocols/cdp.c.

Affected products

lldpd: before 1.0.17 — fixed in 1.0.17

How to fix

Upgrade to a fixed version: lldpd 1.0.17. Check the vendor advisory for mitigations.

References

https://github.com/lldpd/lldpd/commit/a9aeabdf879c25c584852a0bb5523837632f099b
https://github.com/lldpd/lldpd/releases/tag/1.0.17
https://lists.debian.org/debian-lts-announce/2023/09/msg00025.html
https://www.debian.org/security/2023/dsa-5505
https://github.com/lldpd/lldpd/commit/a9aeabdf879c25c584852a0bb5523837632f099b
https://github.com/lldpd/lldpd/releases/tag/1.0.17
https://lists.debian.org/debian-lts-announce/2023/09/msg00025.html
https://www.debian.org/security/2023/dsa-5505

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