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CVE-2025-71270

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

LoongArch: Enable exception fixup for specific ADE subcode

This patch allows the LoongArch BPF JIT to handle recoverable memory access errors generated by BPF_PROBE_MEM* instructions.

When a BPF program performs memory access operations, the instructions it executes may trigger ADEM exceptions. The kernel’s built-in BPF exception table mechanism (EX_TYPE_BPF) will generate corresponding exception fixup entries in the JIT compilation phase; however, the architecture-specific trap handling function needs to proactively call the common fixup routine to achieve exception recovery.

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do_ade(): fix EX_TYPE_BPF memory access exceptions for BPF programs, ensure safe execution.

Relevant test cases: illegal address access tests in module_attach and subprogs_extable of selftests/bpf.

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-71270",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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          "programFiles": [
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          "vendor": "Linux",
          "product": "Linux",
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              "version": "0",
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              "versionType": "semver",
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            },
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              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
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          ],
          "defaultStatus": "affected"
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      ]
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  "published": "2026-03-18T18:16:22.230",
  "references": [
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      "tags": [
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    },
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Enable exception fixup for specific ADE subcode\n\nThis patch allows the LoongArch BPF JIT to handle recoverable memory\naccess errors generated by BPF_PROBE_MEM* instructions.\n\nWhen a BPF program performs memory access operations, the instructions\nit executes may trigger ADEM exceptions. The kernel’s built-in BPF\nexception table mechanism (EX_TYPE_BPF) will generate corresponding\nexception fixup entries in the JIT compilation phase; however, the\narchitecture-specific trap handling function needs to proactively call\nthe common fixup routine to achieve exception recovery.\n\ndo_ade(): fix EX_TYPE_BPF memory access exceptions for BPF programs,\nensure safe execution.\n\nRelevant test cases: illegal address access tests in module_attach and\nsubprogs_extable of selftests/bpf."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nLoongArch: Habilitar la corrección de excepciones para un subcódigo ADE específico\n\nEste parche permite al JIT BPF de LoongArch manejar errores de acceso a memoria recuperables generados por instrucciones BPF_PROBE_MEM*.\n\nCuando un programa BPF realiza operaciones de acceso a memoria, las instrucciones que ejecuta pueden desencadenar excepciones ADEM. El mecanismo de tabla de excepciones BPF integrado del kernel (EX_TYPE_BPF) generará entradas de corrección de excepciones correspondientes en la fase de compilación JIT; sin embargo, la función de manejo de trampas específica de la arquitectura necesita llamar proactivamente a la rutina de corrección común para lograr la recuperación de la excepción.\n\ndo_ade(): corrige las excepciones de acceso a memoria EX_TYPE_BPF para programas BPF, asegura la ejecución segura.\n\nCasos de prueba relevantes: pruebas de acceso a direcciones ilegales en module_attach y subprogs_extable de selftests/bpf."
    }
  ],
  "lastModified": "2026-06-17T10:03:59.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}