DEBIAN-CVE-2026-46433
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.
DEBIAN-CVE-2026-46433
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-46433
lldpd
Source reference: /affected/0/package/name
- Affected versions
- 1.0.16-1
Source reference:
/affected/0/versions1.0.16-1+deb12u1Source reference:
/affected/0/versions1.0.17-1Source reference:
/affected/0/versions1.0.18-1Source reference:
/affected/0/versions1.0.19-1Source reference:
/affected/0/versions1.0.21-1Source reference:
/affected/0/versions1.0.22-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lldpd
Source reference: /affected/1/package/name
- Affected versions
- 1.0.18-1
Source reference:
/affected/1/versions1.0.19-1Source reference:
/affected/1/versions1.0.21-1Source reference:
/affected/1/versions1.0.22-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lldpd
Source reference: /affected/2/package/name
- Affected versions
- 1.0.18-1
Source reference:
/affected/2/versions1.0.19-1Source reference:
/affected/2/versions1.0.21-1Source reference:
/affected/2/versions - Fixed versions
- 1.0.22-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lldpd",
"purl": "pkg:deb/debian/lldpd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.0.16-1",
"1.0.16-1+deb12u1",
"1.0.17-1",
"1.0.18-1",
"1.0.19-1",
"1.0.21-1",
"1.0.22-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-46433.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lldpd",
"purl": "pkg:deb/debian/lldpd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.0.18-1",
"1.0.19-1",
"1.0.21-1",
"1.0.22-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-46433.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.22-1"
}
]
}
],
"package": {
"name": "lldpd",
"purl": "pkg:deb/debian/lldpd?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.0.18-1",
"1.0.19-1",
"1.0.21-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-46433.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57180 · Revision 1
- Added to Heist Feed
- Publisher date