CVE-2025-50518

Published: Aug 14, 2025Modified: Jun 17, 2026Deferred

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (4)

https://github.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md

Source: cve@mitre.org

https://github.com/IreneTheITCrowd/blog/issues/1

Source: cve@mitre.org

https://github.com/obgm/libcoap/issues/1724#issuecomment-3199631257

Source: cve@mitre.org

https://github.com/obgm/libcoap/issues/1724#issuecomment-3234613482

Source: cve@mitre.org

Timeline

No history available yet.