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CVE-2026-64573

Estado: RecibidaSin puntuar—

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

Bluetooth: qca: fix NVM tag length underflow in TLV parser

In the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is "while (idx < length - sizeof(struct tlv_type_nvm))". "length" is a signed int from the firmware TLV header and sizeof(struct tlv_type_nvm) is a size_t (12), so "length" is converted to size_t and any firmware-supplied "length" < 12 makes the subtraction wrap to a huge value. The loop body then reads a 12-byte struct tlv_type_nvm past the end of the short vmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it).

Leer descripción completaMostrar menos

Rewrite the bound as "idx + sizeof(struct tlv_type_nvm) <= length"; both operands are non-negative, so it no longer underflows and a "length" too small for one record correctly skips the loop.

Detalles técnicos trazas, registros y código del informe original
  BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421)
  Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52
  Workqueue: hci0 hci_power_on
  Call Trace:
   ...
   kasan_report (mm/kasan/report.c:595)
   qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617)
   qca_uart_setup (drivers/bluetooth/btqca.c:948)
   qca_setup (drivers/bluetooth/hci_qca.c:2029)
   hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438)
   hci_dev_open_sync (net/bluetooth/hci_sync.c:5227)
   hci_power_on (net/bluetooth/hci_core.c:920)
   process_one_work (kernel/workqueue.c:3322)
   worker_thread (kernel/workqueue.c:3486)
   kthread (kernel/kthread.c:436)
   ret_from_fork (arch/x86/kernel/process.c:158)
   ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

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

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-64573",
  "cveTags": [],
  "metrics": {},
  "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": "ed53949cc92e28aaa3463d246942bda1fbb7f307",
              "lessThan": "a7ee11441d71ab036a705d110a415421f5a4a898",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1caceadfb50432dbf6d808796cb6c34ebb6d662c",
              "lessThan": "5d34e537755d2f9eba2d4e54d70126f987ef20b4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "427281f9498ed614f9aabc80e46ec077c487da6d",
              "lessThan": "70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2e4edfa1e2bd821a317e7d006517dcf2f3fac68d",
              "lessThan": "59fd2f075bca94f030c7c78e94878ea0803d7690",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2e4edfa1e2bd821a317e7d006517dcf2f3fac68d",
              "lessThan": "a087ed960fce54e9302796229e9d545bbc9bcd4a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2e4edfa1e2bd821a317e7d006517dcf2f3fac68d",
              "lessThan": "4fcfb5b2c736785464ff9745f94c6726c5ee2d85",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2e4edfa1e2bd821a317e7d006517dcf2f3fac68d",
              "lessThan": "c90164ca0f7036942ba088eb7ea8d3f6c2352020",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "02f05ed44b71152d5e11d29be28aed91c0489b4e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.159",
              "lessThan": "5.15.216",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.91",
              "lessThan": "6.1.183",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.31",
              "lessThan": "6.6.148",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.8.10",
              "lessThan": "6.9",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/bluetooth/btqca.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/bluetooth/btqca.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-05T08:16:37.057",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d34e537755d2f9eba2d4e54d70126f987ef20b4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a087ed960fce54e9302796229e9d545bbc9bcd4a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a7ee11441d71ab036a705d110a415421f5a4a898",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: qca: fix NVM tag length underflow in TLV parser\n\nIn the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is\n\"while (idx < length - sizeof(struct tlv_type_nvm))\". \"length\" is a signed\nint from the firmware TLV header and sizeof(struct tlv_type_nvm) is a\nsize_t (12), so \"length\" is converted to size_t and any firmware-supplied\n\"length\" < 12 makes the subtraction wrap to a huge value. The loop body\nthen reads a 12-byte struct tlv_type_nvm past the end of the short\nvmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it).\n\nRewrite the bound as \"idx + sizeof(struct tlv_type_nvm) <= length\"; both\noperands are non-negative, so it no longer underflows and a \"length\" too\nsmall for one record correctly skips the loop.\n\n  BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421)\n  Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52\n  Workqueue: hci0 hci_power_on\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617)\n   qca_uart_setup (drivers/bluetooth/btqca.c:948)\n   qca_setup (drivers/bluetooth/hci_qca.c:2029)\n   hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438)\n   hci_dev_open_sync (net/bluetooth/hci_sync.c:5227)\n   hci_power_on (net/bluetooth/hci_core.c:920)\n   process_one_work (kernel/workqueue.c:3322)\n   worker_thread (kernel/workqueue.c:3486)\n   kthread (kernel/kthread.c:436)\n   ret_from_fork (arch/x86/kernel/process.c:158)\n   ret_from_fork_asm (arch/x86/entry/entry_64.S:245)"
    }
  ],
  "lastModified": "2026-08-19T17:20:17.243",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}