CVE-2025-15468

Published Jan 27, 2026

Last updated 3 months ago

CVSS medium 5.9

Container Security

SSL

Overview

Description: Issue summary: If an application using the SSL_CIPHER_find() function in a QUIC protocol client or server receives an unknown cipher suite from the peer, a NULL dereference occurs. Impact summary: A NULL pointer dereference leads to abnormal termination of the running process causing Denial of Service. Some applications call SSL_CIPHER_find() from the client_hello_cb callback on the cipher ID received from the peer. If this is done with an SSL object implementing the QUIC protocol, NULL pointer dereference will happen if the examined cipher ID is unknown or unsupported. As it is not very common to call this function in applications using the QUIC protocol and the worst outcome is Denial of Service, the issue was assessed as Low severity. The vulnerable code was introduced in the 3.2 version with the addition of the QUIC protocol support. The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue, as the QUIC implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue. OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Source: openssl-security@openssl.org
NVD status: Analyzed
Products: openssl

Risk scores

CVSS 3.1

Type: Secondary
Base score: 5.9
Impact score: 3.6
Exploitability score: 2.2
Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: MEDIUM

Weaknesses

openssl-security@openssl.org: CWE-476

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "F5292E9E-6B50-409F-9219-7B0A04047AD8",
            "versionEndExcluding": "3.3.6",
            "versionStartIncluding": "3.3.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "B9D3DCAE-317D-4DFB-93F0-7A235A229619",
            "versionEndExcluding": "3.4.4",
            "versionStartIncluding": "3.4.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "1CAC7CBE-EC03-4089-938A-0CEEB2E09B62",
            "versionEndExcluding": "3.5.5",
            "versionStartIncluding": "3.5.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "68352537-5E99-4F4D-B78A-BCF0353A70A5",
            "versionEndExcluding": "3.6.1",
            "versionStartIncluding": "3.6.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References