cve-2026-64565

{
  "cvss": 0.0,
  "datePublished": "2026-08-04T07:16:31.477",
  "dateUpdated": "2026-11-03T18:15:39.353",
  "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()\n\nThe `ims_pcu_process_data()` processes incoming URB data byte by byte.\nHowever, it fails to check if the `read_pos` index exceeds\nIMS_PCU_BUF_SIZE.\n\nIf a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,\n`read_pos` will increment indefinitely. Moreover, since `read_pos` is\nlocated immediately after `read_buf`, the attacker can overwrite\n`read_pos` itself to arbitrarily control the index.\n\nThis manipulated `read_pos` is subsequently used in\n`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a\nheap buffer overflow.\n\nSpecifically, an attacker can overwrite the `cmd_done.wait.head` located\nat offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.\nConsequently, when the driver calls `complete(&pcu->cmd_done)`, it\ntriggers a control flow hijack by using the manipulated pointer.\n\nFix this by adding a bounds check for `read_pos` before writing to\n`read_buf`. If the packet is too long, discard it, log a warning,\nand reset the parser state.\n\n[dtor: factor out resetting packet state, reset checksum as well]",
  "id": "CVE-2026-64565",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Linux",
            "programFiles": [
              "drivers/input/misc/ims-pcu.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "lessThan": "06cfff93fd40441292567b999091beab11c74504",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "992a7173364dcf63e30012af43da3c2f279839f9",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "3a801bc75ba1d121d0ed60e7234f93ba5651d87d",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "40bbbf2e91fd60715525bf0405c67876af817edf",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "d03a740e087de7dcb2a26dc1123377bd3d1d84ca",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              },
              {
                "lessThan": "875115b82c295277b81b6dfee7debc725f44e854",
                "status": "affected",
                "version": "628329d52474323938a03826941e166bc7c8eff4",
                "versionType": "git"
              }
            ]
          },
          {
            "defaultStatus": "affected",
            "product": "Linux",
            "programFiles": [
              "drivers/input/misc/ims-pcu.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "3.10"
              },
              {
                "lessThan": "3.10",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "5.10.*",
                "status": "unaffected",
                "version": "5.10.265",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "5.15.*",
                "status": "unaffected",
                "version": "5.15.216",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.1.*",
                "status": "unaffected",
                "version": "6.1.183",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.6.*",
                "status": "unaffected",
                "version": "6.6.148",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.12.*",
                "status": "unaffected",
                "version": "6.12.101",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.42",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
          }
        ],
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()\n\nThe `ims_pcu_process_data()` processes incoming URB data byte by byte.\nHowever, it fails to check if the `read_pos` index exceeds\nIMS_PCU_BUF_SIZE.\n\nIf a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,\n`read_pos` will increment indefinitely. Moreover, since `read_pos` is\nlocated immediately after `read_buf`, the attacker can overwrite\n`read_pos` itself to arbitrarily control the index.\n\nThis manipulated `read_pos` is subsequently used in\n`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a\nheap buffer overflow.\n\nSpecifically, an attacker can overwrite the `cmd_done.wait.head` located\nat offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.\nConsequently, when the driver calls `complete(&pcu->cmd_done)`, it\ntriggers a control flow hijack by using the manipulated pointer.\n\nFix this by adding a bounds check for `read_pos` before writing to\n`read_buf`. If the packet is too long, discard it, log a warning,\nand reset the parser state.\n\n[dtor: factor out resetting packet state, reset checksum as well]"
      },
      {
        "lang": "es",
        "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: ims-pcu - soluciona desbordamiento de búfer de pila en ims_pcu_process_data()\n\nLa ’ims_pcu_process_data()’ procesa los datos URB entrantes byte a byte.\nSin embargo, no verifica si el índice ’read_pos’ excede ’IMS_PCU_BUF_SIZE’.\n\nSi un dispositivo USB malicioso envía un paquete más grande que ’IMS_PCU_BUF_SIZE’, ’read_pos’ se incrementará indefinidamente. Además, dado que ’read_pos’ se encuentra inmediatamente después de ’read_buf’, el atacante puede sobrescribir el propio ’read_pos’ para controlar arbitrariamente el índice.\n\nEste ’read_pos’ manipulado se utiliza posteriormente en ’ims_pcu_handle_response()’ para copiar datos en ’cmd_buf’, lo que lleva a un desbordamiento de búfer de pila.\n\nEspecíficamente, un atacante puede sobrescribir el ’cmd_done.wait.head’ ubicado en el desplazamiento 136 con respecto a ’cmd_buf’ en ’ims_pcu_handle_response()’. En consecuencia, cuando el controlador llama a ’complete(&pcu  ->  cmd_done)’, desencadena un secuestro de flujo de control mediante el uso del puntero manipulado.\n\nSolucione esto añadiendo una comprobación de límites para ’read_pos’ antes de escribir en ’read_buf’. Si el paquete es demasiado largo, deséchelo, registre una advertencia y reinicie el estado del analizador.\n\n[dtor: refactorizar el restablecimiento del estado del paquete, restablecer la suma de verificación también]"
      }
    ],
    "id": "CVE-2026-64565",
    "lastModified": "2026-11-03T18:15:39.353",
    "metrics": {},
    "published": "2026-08-04T07:16:31.477",
    "references": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/06cfff93fd40441292567b999091beab11c74504"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/3a801bc75ba1d121d0ed60e7234f93ba5651d87d"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/40bbbf2e91fd60715525bf0405c67876af817edf"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/875115b82c295277b81b6dfee7debc725f44e854"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/992a7173364dcf63e30012af43da3c2f279839f9"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "url": "https://git.kernel.org/stable/c/d03a740e087de7dcb2a26dc1123377bd3d1d84ca"
      }
    ],
    "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "vulnStatus": "Awaiting Analysis"
  },
  "severity": "UNKNOWN",
  "source": "nvd",
  "title": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims..."
}