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TI-2025-40377 Aliases CVE-2025-65501GHSA-cx3h-f553-x7gw

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote…

Priority LOW 20CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-476.

Summary

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00284 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:*4.3.5Vulnerablelibcoap
  • cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:* Versions 4.3.5 Vulnerable ·libcoap

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-65501
  2. 2026-10-03 Alias added: GHSA-cx3h-f553-x7gw

References

Other 2

  • TI-2024-00887 obgm libcoap Configuration File coap_oscore.c get_split_entry stack-based overflow CVSS 3.1HIGH 7.8
  • TI-2024-20447 An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior… CVSS 3.1HIGH 7.5
  • TI-2023-17937 libcoap 4.3.1 contains a buffer over-read via the function coap_parse_oscore_conf_mem at coap_oscore.c. CVSS 3.1MEDIUM 6.5
  • TI-2026-23178 libcoap Out-of-Bounds Read in OSCORE CBOR Unwrap Handling CVSS 4.0HIGH 8.8
  • TI-2023-14242 Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56… CVSS 3.1HIGH 7.5
  • TI-2025-40369 NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote… CVSS 3.1HIGH 7.5
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences