Upstream information

CVE-2025-65495 at MITRE

Description

Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (CISA-ADP)
Base Score 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1254191 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • libcoap-devel >= 4.3.5a-1.1
  • libcoap-utils >= 4.3.5a-1.1
  • libcoap3-3 >= 4.3.5a-1.1
 Patchnames:
openSUSE-Tumbleweed-2025-15780

SUSE Timeline for this CVE

CVE page created: Mon Nov 24 16:02:33 2025
CVE page last modified: Tue Dec 2 18:26:13 2025