cvelistv5 - cve-2025-12888

CVE-2025-12888 (GCVE-0-2025-12888)

Vulnerability from cvelistv5 – Published: 2025-11-21 22:50 – Updated: 2025-11-24 15:44

Summary

Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.

Severity ?

1 (Low)


                        
                          CVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N

CWE

CWE-203 - Observable Discrepancy

Assigner

wolfSSL

References

URL

Tags

https://https://github.com/wolfSSL/wolfssl/pull/9275

Impacted products

	Vendor	Product	Version
	wolfSSL	wolfSSL	Affected: 5.8.2

Credits

Adrian Cinal

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-12888

Vulnerability from fkie_nvd - Published: 2025-11-21 23:15 - Updated: 2025-12-04 16:07

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	facts@wolfssl.com	https://https://github.com/wolfSSL/wolfssl/pull/9275	Broken Link

Impacted products

	Vendor	Product	Version
	wolfssl	wolfssl	5.8.2

JSON

To clipboard

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  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:wolfssl:wolfssl:5.8.2:*:*:*:*:*:*:*",
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  "id": "CVE-2025-12888",
  "lastModified": "2025-12-04T16:07:14.913",
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GHSA-XMGQ-3783-QGM4

Vulnerability from github – Published: 2025-11-22 00:31 – Updated: 2025-12-04 18:30

Details

Severity ?

7.5 (High)


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

1.0 (Low)


                  
                    CVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2025-12888"
  ],
  "database_specific": {
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      "CWE-203"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-21T23:15:44Z",
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  },
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  "id": "GHSA-xmgq-3783-qgm4",
  "modified": "2025-12-04T18:30:39Z",
  "published": "2025-11-22T00:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12888"
    },
    {
      "type": "WEB",
      "url": "https://https://github.com/wolfSSL/wolfssl/pull/9275"
    }
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  "schema_version": "1.4.0",
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      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

MSRC_CVE-2025-12888

Vulnerability from csaf_microsoft - Published: 2025-11-02 00:00 - Updated: 2025-12-03 01:36

Summary

Constant Time Issue with Xtensa-based ESP32 and X22519

Notes

Additional Resources

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer

The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

JSON

To clipboard

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        "url": "https://www.first.org/tlp/"
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    "notes": [
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        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
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    ],
    "publisher": {
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      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
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        "summary": "CVE-2025-12888 Constant Time Issue with Xtensa-based ESP32 and X22519 - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-12888.json"
      },
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      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              },
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "category": "product_name",
            "name": "cbl2 mariadb 10.6.21-1",
            "product": {
              "name": "cbl2 mariadb 10.6.21-1",
              "product_id": "1"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 mariadb 10.11.11-1",
            "product": {
              "name": "azl3 mariadb 10.11.11-1",
              "product_id": "2"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 mariadb 10.6.21-1 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 mariadb 10.11.11-1 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-12888",
      "cwe": {
        "id": "CWE-203",
        "name": "Observable Discrepancy"
      },
      "flags": [
        {
          "label": "component_not_present",
          "product_ids": [
            "17086-1",
            "17084-2"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "wolfSSL",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "17086-1",
          "17084-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-12888 Constant Time Issue with Xtensa-based ESP32 and X22519 - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-12888.json"
        }
      ],
      "title": "Constant Time Issue with Xtensa-based ESP32 and X22519"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-12888 (GCVE-0-2025-12888)

FKIE_CVE-2025-12888

GHSA-XMGQ-3783-QGM4

MSRC_CVE-2025-12888

Tags

Sightings

Nomenclature