CVE-2026-46433
Medium · 6.5CVSS
6.5
EPSS
0.4%
Published
Jun 9, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | lldpd | 0 | 1.0.22-bp160.1.1 |
| openSUSE:Tumbleweed | lldpd | 0 | 1.0.22-1.1 |
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