{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-72048",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-72048"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "ieee802154: ca8210: fix cas_ctl leak on spi_async failure",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: ca8210: fix cas_ctl leak on spi_async failure\n\nca8210_spi_transfer() allocates cas_ctl with kzalloc_obj(GFP_ATOMIC)\nand relies entirely on the SPI completion callback\nca8210_spi_transfer_complete() to free it.\n\nThe spi_async() API only invokes the completion callback on successful\nsubmission.  On failure it returns a negative error code without ever\nqueuing the callback, which leaves cas_ctl and its embedded spi_message\nand spi_transfer orphaned.  Every kfree(cas_ctl) in the driver is\ninside the completion callback, so there is no other reclamation path.\n\nca8210_spi_transfer() is called from ca8210_spi_exchange(), the\ninterrupt handler ca8210_interrupt_handler(), and from the retry path\ninside the completion callback itself.  The exchange and interrupt\nhandler paths loop on -EBUSY, so under sustained SPI bus contention\nevery retry iteration leaks a fresh cas_ctl (~600 bytes per\noccurrence).\n\nFix it by freeing cas_ctl on the spi_async() error path.  While here,\ncorrect the misleading error string: the function calls spi_async(),\nnot spi_sync().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-72048"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/460c5cd51e4d7d15b317f178f42cfcb666c0fe91"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b07aea90dbc6e188c74c100af64b77b9482ffc65"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fe90605b651573d30be8293ff5be40e3d7023117"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b9071dc7889bef42590e04fbf3e56cc65e1e5e6e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d4a397fe803c2d157f6ebb068b802ef75fbf109e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cb5cca1d2a908ddd5e357971de0f2009617b8d6a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7e3630fbb6aabb844bbf35746dee0bf3894100c7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e09390e439bd7cca30dd10893b1f64802961667a"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}