Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md
- https://github.com/IreneTheITCrowd/blog/issues/1
- https://github.com/obgm/libcoap/issues/1724#issuecomment-3199631257
- https://github.com/obgm/libcoap/issues/1724#issuecomment-3234613482
FAQ
What is CVE-2025-50518?
CVE-2025-50518 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 obje...
How severe is CVE-2025-50518?
CVE-2025-50518 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-50518?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.