Vulnerability-Lookup

BDU:2025-07767 (CVE-2025-46415)

Vulnerability from fstec – Published: 2025-07-02 – Updated: 2025-07-02 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции unlinkat() пакетных менеджеров Nix, Lix и Guix, позволяющая нарушителю повысить свои привилегии

Summary

Уязвимость функции unlinkat() пакетных менеджеров Nix, Lix и Guix связана с ошибками синхронизации при использовании общего ресурса. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии

Severity

1.2 (Low) CVSS 2.0


                      
                        AV:L/AC:H/Au:N/C:N/I:N/A:P

3.2 (Low) CVSS 3.0


                      
                        CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Timing and state manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-367 - Ситуация гонки Time-of-check Time-of-use (TOCTOU)

Aliases

CVE-2025-46415

References

5 references

URL
https://lix.systems/blog/2025-06-24-lix-cves/
https://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/
https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-li…
https://lists.gnu.org/archive/html/guix-devel/2025-06/msg00205.html
https://discourse.nixos.org/t/pre-disclosure-announcement-security-advisory-for…

Impacted products

3 products from 2 vendors

Vendors

Сообщество свободного программного обеспечения, The GNU Project

Products

Nix, Lix, Guix

Versions

до 2.24.15 (Nix), от 2.26.0 до 2.26.4 (Nix), от 2.28.0 до 2.28.4 (Nix), 2.29.0 (Nix), до 2.91.2 (Lix), от 2.92.0 до 2.92.2 (Lix), 2.93.0 (Lix), до 1.4.0-38.0e79d5b (Guix)

Product types

Application software

Mitigations

Использование рекомендаций: Для Nix: https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017/9 Для Lix: https://lix.systems/blog/2025-06-24-lix-cves/ Для Guix: https://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/ https://codeberg.org/guix/guix/commit/30a5d140aa5a789a362749d057754783fea83dde

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:H/Au:N/C:N/I:N/A:P",
  "CVSS 3.0": "AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f, The GNU Project",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u0434\u043e 2.24.15 (Nix), \u043e\u0442 2.26.0 \u0434\u043e 2.26.4 (Nix), \u043e\u0442 2.28.0 \u0434\u043e 2.28.4 (Nix), 2.29.0 (Nix), \u0434\u043e 2.91.2 (Lix), \u043e\u0442 2.92.0 \u0434\u043e 2.92.2 (Lix), 2.93.0 (Lix), \u0434\u043e 1.4.0-38.0e79d5b (Guix)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\u0414\u043b\u044f Nix:\nhttps://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017/9\n\n\u0414\u043b\u044f Lix:\nhttps://lix.systems/blog/2025-06-24-lix-cves/\n\n\u0414\u043b\u044f Guix:\nhttps://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/\nhttps://codeberg.org/guix/guix/commit/30a5d140aa5a789a362749d057754783fea83dde",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "26.03.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "02.07.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "02.07.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-07767",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2025-46415",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Nix, Lix, Guix",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": null,
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 unlinkat() \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0445 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u043e\u0432 Nix, Lix \u0438 Guix, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u0421\u0438\u0442\u0443\u0430\u0446\u0438\u044f \u0433\u043e\u043d\u043a\u0438 Time-of-check Time-of-use (TOCTOU) (CWE-367)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 unlinkat() \u043f\u0430\u043a\u0435\u0442\u043d\u044b\u0445 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u043e\u0432 Nix, Lix \u0438 Guix \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043e\u0431\u0449\u0435\u0433\u043e \u0440\u0435\u0441\u0443\u0440\u0441\u0430. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0440\u043e\u043a\u0430\u043c\u0438 \u0438 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://lix.systems/blog/2025-06-24-lix-cves/\nhttps://guix.gnu.org/en/blog/2025/privilege-escalation-vulnerabilities-2025/\nhttps://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017\nhttps://lists.gnu.org/archive/html/guix-devel/2025-06/msg00205.html\nhttps://discourse.nixos.org/t/pre-disclosure-announcement-security-advisory-for-nix-and-lix-on-june-24-2025/65831",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-367",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041d\u0438\u0437\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 1,2)\n\u041d\u0438\u0437\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 3,2)"
}

CVE-2025-46415 (GCVE-0-2025-46415)

Vulnerability from cvelistv5 – Published: 2025-06-27 00:00 – Updated: 2025-06-27 19:57

Summary

A race condition in the Nix, Lix, and Guix package managers allows the removal of content from arbitrary folders. This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b.

Severity

3.2 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-27 19:57 UTC

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

mitre mitre root

References

6 references

URL	Tags
https://discourse.nixos.org/t/security-advisory-p…
https://lix.systems/blog/2025-06-24-lix-cves/
https://guix.gnu.org/en/blog/2025/privilege-escal…
https://labs.snyk.io
https://security.snyk.io/vuln/?search=CVE-2025-46415
https://security-tracker.debian.org/tracker/CVE-2…

Impacted products

1 product

Vendor	Product	Version
NixOS	Nix	Affected: 0 , < 2.24.15 (semver) Affected: 2.25.0 , < 2.26.4 (semver) Affected: 2.27.0 , < 2.28.4 (semver) Affected: 2.29.0 , < 2.29.1 (semver) cpe:2.3:a:nixos:nix:::::::: cpe:2.3:a:nixos:nix:::::::: cpe:2.3:a:nixos:nix:::::::: cpe:2.3:a:nixos:nix::::::::

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-46415",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-27T19:57:42.327675Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-27T19:57:56.693Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Nix",
          "vendor": "NixOS",
          "versions": [
            {
              "lessThan": "2.24.15",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.26.4",
              "status": "affected",
              "version": "2.25.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.28.4",
              "status": "affected",
              "version": "2.27.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.29.1",
              "status": "affected",
              "version": "2.29.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.24.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.26.4",
                  "versionStartIncluding": "2.25.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.28.4",
                  "versionStartIncluding": "2.27.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.29.1",
                  "versionStartIncluding": "2.29.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A race condition in the Nix, Lix, and Guix package managers allows the removal of content from arbitrary folders. This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 3.2,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L",
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            {
              "cweId": "CWE-367",
              "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
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          "url": "https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017"
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          "url": "https://lix.systems/blog/2025-06-24-lix-cves/"
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        {
          "url": "https://security.snyk.io/vuln/?search=CVE-2025-46415"
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    "datePublished": "2025-06-27T00:00:00.000Z",
    "dateReserved": "2025-04-24T00:00:00.000Z",
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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.