Skip to content
Fencer Vulns
critical 9.8

CVE-2023-41910 json

An issue was discovered in lldpd before 1.0.17.

published 2023-09-05 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-46388

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

An issue was discovered in lldpd before 1.0.17. By crafting a CDP PDU packet with specific CDP_TLV_ADDRESSES TLVs, a malicious actor can remotely force the lldpd daemon to perform an out-of-bounds read on heap memory. This occurs in cdp_decode in daemon/protocols/cdp.c.

Patch / fix

  • lldpd_project lldpd 1.0.17
  • lldpd Debian 12 1.0.16-1+deb12u1
  • lldpd Debian 14, Debian 13 1.0.17-1

debian advisories DEBIAN-CVE-2023-41910

  • lldpd RHEL 9 1.0.18-4.el9

red hat advisories RHSA-2024:9158

  • lldpd openSUSE Tumbleweed 1.0.23-1.1

opensuse advisories openSUSE-SU-2026:12272-1

  • lldpd AlmaLinux 9 1.0.18-4.el9

almalinux advisories ALSA-2024:9158

  • lldpd Rocky Linux 9 1.0.18-4.el9

rocky linux advisories RLSA-2024:9158

  • lldpd CBL-Mariner 2.0 1.0.14-3

azure linux advisories AZL-28656

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-41910 updated cvss 7.5

lldpd: CDP PDU Packet cdp.c out-of-bounds read

  • Red Hat Enterprise Linux 8 lldpd
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) lldpd 1.0.18-4.el9
    fixed: vendor fix RHSA-2024:9158

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-24-165-06 updated cvss 9.8

Siemens TIM 1531 IRC

  • Siemens SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) <V2.4.8 Siemens TIM 1531 IRC (6GK7543-1MX00-0XE0) <V2.4.8
    affected: fixed in V2.4.8 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-24-165-10 updated cvss 9.8

Siemens SIMATIC and SIPLUS

  • Siemens SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) <V2.3 Siemens SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) <V2.3 Siemens SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) <V2.3 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) <V2.3
    affected: fixed in V2.3 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.