6.5

CVE-2026-46433

lldpd: Heap OOB Read in VLAN Decapsulation memmove

lldpd is an implementation of IEEE 802.1ab (LLDP). Prior to version 1.0.22, lldpd_decode() in src/daemon/lldpd.c strips 802.1Q VLAN tags from received Ethernet frames by calling memmove() to shift the frame payload 4 bytes left. The third argument (byte count) is s - 2 * ETHER_ADDR_LEN but should be s - 2 * ETHER_ADDR_LEN - 4, causing a 4-byte heap buffer over-read past the malloc(h_mtu) allocation when the received frame size equals the interface MTU. This issue has been patched in version 1.0.22.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Lldpd Project ≫ Lldpd Version < 1.0.22
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.13
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.5 2.8 3.6
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3
Vendor Advisory
https://github.com/lldpd/lldpd/pull/787
Patch
Issue Tracking
https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6
Patch
https://github.com/lldpd/lldpd/releases/tag/1.0.22
Product
Release Notes