{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-45981",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-45981"
  ],
  "published": "2026-05-27T12:19:29Z",
  "summary": "s390/cio: Fix device lifecycle handling in css_alloc_subchannel()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix device lifecycle handling in css_alloc_subchannel()\n\n`css_alloc_subchannel()` calls `device_initialize()` before setting up\nthe DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails,\nthe error path frees the subchannel structure directly, bypassing\nthe device model reference counting.\n\nOnce `device_initialize()` has been called, the embedded struct device\nmust be released via `put_device()`, allowing the release callback to\nfree the container structure.\n\nFix the error path by dropping the initial device reference with\n`put_device()` instead of calling `kfree()` directly.\n\nThis ensures correct device lifetime handling and avoids potential\nuse-after-free or double-free issues.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45981"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-01T16:20:16Z"
  }
}