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CVE Vulnerability Details :
CVE-2026-46433
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-09 Jun, 2026 | 22:49
Updated At-10 Jun, 2026 | 18:12
Rejected At-
▼CVE Numbering Authority (CNA)
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.

Affected Products
Vendor
lldpd
Product
lldpd
Versions
Affected
  • < 1.0.22
Problem Types
TypeCWE IDDescription
CWECWE-125CWE-125: Out-of-bounds Read
Type: CWE
CWE ID: CWE-125
Description: CWE-125: Out-of-bounds Read
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3
x_refsource_CONFIRM
https://github.com/lldpd/lldpd/pull/787
x_refsource_MISC
https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6
x_refsource_MISC
https://github.com/lldpd/lldpd/releases/tag/1.0.22
x_refsource_MISC
Hyperlink: https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/lldpd/lldpd/pull/787
Resource:
x_refsource_MISC
Hyperlink: https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6
Resource:
x_refsource_MISC
Hyperlink: https://github.com/lldpd/lldpd/releases/tag/1.0.22
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found