Paper/Archive/CVE-2025-50518

CVE-2025-50518

mitre — A use-after-free vulnerability exists in the coap_delete_pdu_lkd function within coap_pdu.c of the libcoap library.

EPSS 0.5%public exploit CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 40.1.401 × 208.0 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refgithub.com/IreneTheITCrowd/blog/blob/main/libcoap-vulnerability.md refgithub.com/IreneTheITCrowd/blog/issues/1 refgithub.com/obgm/libcoap/issues/1724#issuecomment-3199631257 refgithub.com/obgm/libcoap/issues/1724#issuecomment-3234613482