CVE-2023-41910Network attack vector

Heap out-of-bounds read via crafted CDP addresses

Published Sep 5, 2023 · Updated Sep 30, 2024

Out-of-bounds read in lldpd before 1.0.17 allows remote attackers to read beyond heap memory via crafted CDP address TLVs. In cdp_decode, each parsed address length is discarded without reducing addresses_len, causing later bounds checks to overstate the remaining data. The attack requires delivery of a CDP PDU to an interface processing CDP traffic; published sources do not specify the resulting disclosure or service effect.

CVSS severity9.8
Critical
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in lldpd before 1.0.17 allows remote attackers to read beyond heap memory via crafted CDP address TLVs. In cdp_decode, each parsed address length is discarded without reducing addresses_len, causing later bounds checks to overstate the remaining data. The attack requires delivery of a CDP PDU to an interface processing CDP traffic; published sources do not specify the resulting disclosure or service effect.

The record

CVE
CVE-2023-41910
Published
Sep 5, 2023
Updated
Sep 30, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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