CVEvulnerability

CVE-2026-46433

6.5 MEDIUM Published 2026-06-09 Modified 2026-07-23 Official page ↗
Status
Analyzed
Published
2026-06-09
Last modified
2026-07-23
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-125

Description

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.

Affected configurations

• lldpd project lldpd (< 1.0.22)

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References