{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e5dcf0025d7af58f525590ac86ac27cb44714e8d"
            },
            {
              "fixed": "abb6e07f46a740cda4f07d1b561ae4eaa7a1df42"
            },
            {
              "fixed": "f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424"
            },
            {
              "fixed": "6715560527e343a387e4a0d2e6c401748e89fa55"
            },
            {
              "fixed": "c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603"
            },
            {
              "fixed": "f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45981.json"
  },
  "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.",
  "id": "CVE-2026-45981",
  "modified": "2026-07-08T05:36:47.200084498Z",
  "published": "2026-05-27T12:18:39.923Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45981.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45981"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "s390/cio: Fix device lifecycle handling in css_alloc_subchannel()"
}