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CVE-2025-31115

Estado: AplazadaAlta (8.7)—

XZ Utils provide a general-purpose data-compression library plus command-line tools. In XZ Utils 5.3.3alpha to 5.8.0, the multithreaded .xz decoder in liblzma has a bug where invalid input can at least result in a crash. The effects include heap use after free and writing to an address based on the null pointer plus an offset. Applications and libraries that use the lzma_stream_decoder_mt function are affected. The bug has been fixed in XZ Utils 5.8.1, and the fix has been committed to the v5.4, v5.6, v5.8, and master branches in the xz Git repository. No new release packages will be made from the old stable branches, but a standalone patch is available that applies to all affected releases.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS AV:N/PR:N permite explotación remota sin privilegios (T1190). El crash por entrada inválida y heap use-after-free permiten DoS y potencial escalada de privilegios en aplicaciones que usen lzma_stream_decoder_mt.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability ScanningThreat Intelligence Program

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

XZ — XZ UtilsAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-31115",
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          "id": "CVE-2025-31115",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
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          "version": "2.0.3",
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          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
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          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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      "url": "https://github.com/tukaani-project/xz/commit/d5a2ffe41bb77b918a8c96084885d4dbe4bf6480",
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      "url": "https://tukaani.org/xz/xz-cve-2025-31115.patch",
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          "value": "CWE-366"
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        {
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          "value": "CWE-476"
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          "value": "CWE-826"
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  "descriptions": [
    {
      "lang": "en",
      "value": "XZ Utils provide a general-purpose data-compression library plus command-line tools. In XZ Utils 5.3.3alpha to 5.8.0, the multithreaded .xz decoder in liblzma has a bug where invalid input can at least result in a crash. The effects include heap use after free and writing to an address based on the null pointer plus an offset. Applications and libraries that use the lzma_stream_decoder_mt function are affected. The bug has been fixed in XZ Utils 5.8.1, and the fix has been committed to the v5.4, v5.6, v5.8, and master branches in the xz Git repository. No new release packages will be made from the old stable branches, but a standalone patch is available that applies to all affected releases."
    },
    {
      "lang": "es",
      "value": "XZ Utils proporciona una librería de compresión de datos de propósito general, además de herramientas de línea de comandos. En XZ Utils 5.3.3alpha a 5.8.0, el decodificador .xz multiproceso de liblzma presenta un error que provoca un fallo en la ejecución de una entrada no válida. Esto afecta a use after free y a la escritura en una dirección basada en el puntero nulo y un desplazamiento. Las aplicaciones y librerías que utilizan la función lzma_stream_decoder_mt se ven afectadas. El error se ha corregido en XZ Utils 5.8.1 y la corrección se ha implementado en las ramas v5.4, v5.6, v5.8 y master del repositorio Git de xz. No se crearán nuevos paquetes de versiones a partir de las ramas estables antiguas, pero existe un parche independiente disponible para todas las versiones afectadas."
    }
  ],
  "lastModified": "2026-06-17T09:09:52.910",
  "sourceIdentifier": "security-advisories@github.com"
}