CVE-2026-46433 - lldpd: Heap OOB Read in VLAN Decapsulation memmove

CVE-2026-46433 - lldpd: Heap OOB Read in VLAN Decapsulation memmove

https://cvefeed.io/rssfeed/latest.atom / Wed, 06/10/2026 - 02:28
CVE ID :CVE-2026-46433
Published : June 9, 2026, 10:49 p.m. | 16 minutes ago
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.
Severity: 0.0 | NA
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