CVE-2025-40160

{
  "id": "CVE-2025-40160",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-11-12T11:15:46.123",
  "lastModified": "2026-10-30T13:18:14.127",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/events: Return -EEXIST for bound VIRQs\n\nChange find_virq() to return -EEXIST when a VIRQ is bound to a\ndifferent CPU than the one passed in.  With that, remove the BUG_ON()\nfrom bind_virq_to_irq() to propogate the error upwards.\n\nSome VIRQs are per-cpu, but others are per-domain or global.  Those must\nbe bound to CPU0 and can then migrate elsewhere.  The lookup for\nper-domain and global will probably fail when migrated off CPU 0,\nespecially when the current CPU is tracked.  This now returns -EEXIST\ninstead of BUG_ON().\n\nA second call to bind a per-domain or global VIRQ is not expected, but\nmake it non-fatal to avoid trying to look up the irq, since we don't\nknow which per_cpu(virq_to_irq) it will be in."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxen/events: Devolver -EEXIST para VIRQs enlazados\n\nCambiar find_virq() para que devuelva -EEXIST cuando un VIRQ está enlazado a una CPU diferente a la pasada como argumento. Con esto, eliminar el BUG_ON() de bind_virq_to_irq() para propagar el error hacia arriba.\n\nAlgunos VIRQs son por-CPU, pero otros son por-dominio o globales. Esos deben ser enlazados a la CPU0 y luego pueden migrar a otro lugar. La búsqueda para los por-dominio y globales probablemente fallará cuando se migren fuera de la CPU 0, especialmente cuando se rastrea la CPU actual. Esto ahora devuelve -EEXIST en lugar de BUG_ON().\n\nNo se espera una segunda llamada para enlazar un VIRQ por-dominio o global, pero hacerla no-fatal para evitar intentar buscar la irq, ya que no sabemos en qué per_cpu(virq_to_irq) estará."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/xen/events/events_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
              "lessThan": "7e19b3643855d4b63442bd20e8bb811e1a75998e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
              "lessThan": "612ef6056855c0aacb9b25d1d853c435754483f7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
              "lessThan": "a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
              "lessThan": "f81db055a793eca9d05f79658ff62adafb41d664",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "62cc5fc7b2e0218144e162afb8191db9b924b5e6",
              "lessThan": "07ce121d93a5e5fb2440a24da3dbf408fcee978e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/xen/events/events_base.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3.2",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "3.2",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.113",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.54",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.4",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/07ce121d93a5e5fb2440a24da3dbf408fcee978e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/612ef6056855c0aacb9b25d1d853c435754483f7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7e19b3643855d4b63442bd20e8bb811e1a75998e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a1e7f07ae6b594f1ba5be46c6125b43bc505c5aa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f81db055a793eca9d05f79658ff62adafb41d664",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}