Vulnerability-Lookup

OPENSUSE-SU-2026:21146-1

Vulnerability from csaf_opensuse - Published: 2026-06-22 13:05 - Updated: 2026-09-17 17:36

Summary

Security update for lldpd

Severity

Moderate

Notes

Title of the patch: Security update for lldpd

Description of the patch: This update for lldpd fixes the following issues: Changes in lldpd: - Update to version 1.0.22 * Fix CVE-2026-46433, out-of-bound read access when removing VLAN tag (#787). * Reject 0-length management address in LLDP. * Fix race condition when creating the control socket. * Fix FDP MAC address. * Fix memory leak in the BSD bridge query path. * Fix duplicate management addresses when merging EDP VLAN frames. - Update to version 1.0.21 Changes: * Add "configure lldp portdescription-source" to choose how to populate port description. Fix: * Fix path traversal vulnerabilities in the privileged process. * Fix arbitrary file deletion in the privileged process. * Fix accuracy of Dot3 MAU types advertised and add support for 200G and 400G. * Fix detection of wireless interfaces. - Update to version 1.0.20 Changes: * Enable fast start unconditionally (and move its configuration in "configure lldp"). * Make VLAN advertisements configurable. Fix: * Do not break zero-copy traffic on Linux. * Fix crash on rapid addition/removal of interfaces. * Fix management address selection when pattern is a negative IP address. - Update to version 1.0.19 Changes: * Add cvlan/svlan/tpmr capabilities. * Add lldpctl_watch_sync_unblock to liblldpctl. * Add C++ wrapper for lldpctl. Fix: * Fix AppArmor policy for /run/lldpd/lldpd.socket.lock. * Do not query stats for a down interface on Linux.

Patchnames: openSUSE-Leap-16.0-packagehub-341

CVE-2026-46433

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:liblldpctl4-0:1.0.22-bp160.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:liblldpctl4-0:1.0.22-bp160.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:liblldpctl4-0:1.0.22-bp160.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:liblldpctl4-0:1.0.22-bp160.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-0:1.0.22-bp160.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-0:1.0.22-bp160.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-0:1.0.22-bp160.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-0:1.0.22-bp160.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-devel-0:1.0.22-bp160.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-devel-0:1.0.22-bp160.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-devel-0:1.0.22-bp160.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:lldpd-devel-0:1.0.22-bp160.1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

5 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-46433/	self
https://www.suse.com/security/cve/CVE-2026-46433	external
https://bugzilla.suse.com/1268204	external

JSON

To clipboard

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          "text": "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.",
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CVE-2026-46433 (GCVE-0-2026-46433)

Vulnerability from cvelistv5 – Published: 2026-06-09 22:49 – Updated: 2026-06-10 18:12

Title

lldpd: Heap OOB Read in VLAN Decapsulation memmove

Summary

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

6.5 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-10 18:12 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/lldpd/lldpd/security/advisorie…	x_refsource_CONFIRM
https://github.com/lldpd/lldpd/pull/787	x_refsource_MISC
https://github.com/lldpd/lldpd/commit/ca931be63a9…	x_refsource_MISC
https://github.com/lldpd/lldpd/releases/tag/1.0.22	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
lldpd	lldpd	Affected: < 1.0.22

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-46433",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T18:12:17.598816Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T18:12:30.269Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "lldpd",
          "vendor": "lldpd",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.0.22"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-09T22:49:02.749Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/lldpd/lldpd/security/advisories/GHSA-2g8p-2h3j-63m3"
        },
        {
          "name": "https://github.com/lldpd/lldpd/pull/787",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/lldpd/lldpd/pull/787"
        },
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          "name": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6",
          "tags": [
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          "url": "https://github.com/lldpd/lldpd/commit/ca931be63a9cae0fcd8e9b6ae4e916d49f141cd6"
        },
        {
          "name": "https://github.com/lldpd/lldpd/releases/tag/1.0.22",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/lldpd/lldpd/releases/tag/1.0.22"
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      "source": {
        "advisory": "GHSA-2g8p-2h3j-63m3",
        "discovery": "UNKNOWN"
      },
      "title": "lldpd: Heap OOB Read in VLAN Decapsulation memmove"
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-46433",
    "datePublished": "2026-06-09T22:49:02.749Z",
    "dateReserved": "2026-05-13T22:18:22.830Z",
    "dateUpdated": "2026-06-10T18:12:30.269Z",
    "state": "PUBLISHED"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.