power: supply: pf1550: Fix use-after-free in power_supply_changed()

{
  "id": "5999309131c21dbae931fea97d6f9b0ea147b3d7505a8f233922440f4d58e42d",
  "url": "https://osv.dev/vulnerability/CVE-2026-45906",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "power: supply: pf1550: Fix use-after-free in power_supply_changed()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: power: supply: pf1550: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.",
    "evidence": "osv:CVE-2026-45906",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45906",
      "aliases": [
        "CVE-2026-45906"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4b6b6433a97d5863b5340fc87f866d784fdf0783"
                },
                {
                  "fixed": "1bdefeed904f1f17e1f73a4d8a035515f3a9fad8"
                },
                {
                  "fixed": "838767f5074700552d3f006d867caed65edc7328"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45906.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45906.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.580918917Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1bdefeed904f1f17e1f73a4d8a035515f3a9fad8",
        "https://git.kernel.org/stable/c/838767f5074700552d3f006d867caed65edc7328",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45906.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45906",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45906.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45906",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 500257,
  "published_at": "2026-05-27T12:17:16.142+00:00"
}