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CVE-2022-49709

Estado: AnalizadaMedia (5.5)—

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

cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle

RCU_NONIDLE usage during __cfi_slowpath_diag can result in an invalid RCU state in the cpuidle code path:

Instead, call rcu_irq_enter/exit to wake up RCU only when needed and disable interrupts for the entire CFI shadow/module check when we do.

Detalles técnicos trazas, registros y código del informe original
  WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138
  ...
  Call trace:
    rcu_eqs_enter+0xe4/0x138
    rcu_idle_enter+0xa8/0x100
    cpuidle_enter_state+0x154/0x3a8
    cpuidle_enter+0x3c/0x58
    do_idle.llvm.6590768638138871020+0x1f4/0x2ec
    cpu_startup_entry+0x28/0x2c
    secondary_start_kernel+0x1b8/0x220
    __secondary_switched+0x94/0x98

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)

Mostrar
{
  "id": "CVE-2022-49709",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "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
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "cf68fffb66d60d96209446bfc4a15291dc5a5d41",
              "lessThan": "75f3a5fa2ad049c85ab5d5ee1ed9cfaa7e62c5ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cf68fffb66d60d96209446bfc4a15291dc5a5d41",
              "lessThan": "ca3897f2ac02ceae5e6fa794f83c36f9885b93da",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cf68fffb66d60d96209446bfc4a15291dc5a5d41",
              "lessThan": "57cd6d157eb479f0a8e820fd36b7240845c8a937",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/cfi.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.49",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "5.18.6",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/cfi.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-26T07:01:46.710",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/57cd6d157eb479f0a8e820fd36b7240845c8a937",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/75f3a5fa2ad049c85ab5d5ee1ed9cfaa7e62c5ed",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ca3897f2ac02ceae5e6fa794f83c36f9885b93da",
      "tags": [
        "Patch"
      ],
      "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\ncfi: Fix __cfi_slowpath_diag RCU usage with cpuidle\n\nRCU_NONIDLE usage during __cfi_slowpath_diag can result in an invalid\nRCU state in the cpuidle code path:\n\n  WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138\n  ...\n  Call trace:\n    rcu_eqs_enter+0xe4/0x138\n    rcu_idle_enter+0xa8/0x100\n    cpuidle_enter_state+0x154/0x3a8\n    cpuidle_enter+0x3c/0x58\n    do_idle.llvm.6590768638138871020+0x1f4/0x2ec\n    cpu_startup_entry+0x28/0x2c\n    secondary_start_kernel+0x1b8/0x220\n    __secondary_switched+0x94/0x98\n\nInstead, call rcu_irq_enter/exit to wake up RCU only when needed and\ndisable interrupts for the entire CFI shadow/module check when we do."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cfi: Se solucionó el uso de RCU de __cfi_slowpath_diag con cpuidle El uso de RCU_NONIDLE durante __cfi_slowpath_diag puede generar un estado de RCU no válido en la ruta del código cpuidle: ADVERTENCIA: CPU: 1 PID: 0 en kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138 ... Rastreo de llamadas: rcu_eqs_enter+0xe4/0x138 rcu_idle_enter+0xa8/0x100 cpuidle_enter_state+0x154/0x3a8 cpuidle_enter+0x3c/0x58 do_idle.llvm.6590768638138871020+0x1f4/0x2ec cpu_startup_entry+0x28/0x2c secondary_start_kernel+0x1b8/0x220 __secondary_switched+0x94/0x98 En su lugar, llame a rcu_irq_enter/exit para activar RCU solo cuando sea necesario y deshabilite las interrupciones para toda la verificación del módulo/sombra CFI cuando lo hagamos."
    }
  ],
  "lastModified": "2026-06-17T05:18:55.847",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FEF8BF2A-189A-40B4-AE3D-441A80308DD0",
              "versionEndExcluding": "5.15.49",
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            },
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              "vulnerable": true,
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              "versionEndExcluding": "5.18.6",
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              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*",
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              "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377"
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}