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CVE-2025-50518

CRITICAL

9.8

Description

A use-after-free vulnerability exists in the coap_delete_pdu_lkd function within coap_pdu.c of the libcoap library. This issue occurs due to improper handling of memory after the freeing of a PDU object, leading to potential memory corruption or the possibility of executing arbitrary code. NOTE: this is disputed by the Supplier because it only occurs when an application uses libcoap incorrectly.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/14/2025

Last Modified9/11/2025

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-416

References

https://github.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md(cve@mitre.org)

https://github.com/IreneTheITCrowd/blog/issues/1(cve@mitre.org)

https://github.com/obgm/libcoap/issues/1724#issuecomment-3199631257(cve@mitre.org)

https://github.com/obgm/libcoap/issues/1724#issuecomment-3234613482(cve@mitre.org)

IOC Correlations

No correlations recorded

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