UnratedFix available

power: supply: ab8500: Fix use-after-free in power_supply_changed()

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500: 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()`. Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.

Products: Kernel
Affected versions: Not specified
Fixed versions: 5.15.202, 6.1.165, 6.12.75, 6.18.14, 6.19.4, 6.6.128
CVEs: CVE-2026-45946
Confirmed fixed CVEs: Not specified
Updated in this feed: 5 Nov 2026, 04:24 UTC · Revision 1

Source evidence

power: supply: ab8500: Fix use-after-free in power_supply_changed()

core-osv · Original source

Published 27 May 2026, 12:18 UTC

osv:CVE-2026-45946

Kernel

Fixed versions: 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4

Complete source record

{
  "id": "967f9152891c1aecbd61cfd726cffc70e5ccf4fd6e4718388ba7b9ad3788d62a",
  "url": "https://osv.dev/vulnerability/CVE-2026-45946",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "power: supply: ab8500: Fix use-after-free in power_supply_changed()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500: 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()`. Commit 1c1f13a006ed (\"power: supply: ab8500: Move to componentized binding\") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.",
    "evidence": "osv:CVE-2026-45946",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.202",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.165",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.128",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45946",
      "aliases": [
        "CVE-2026-45946"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb"
                },
                {
                  "fixed": "43cbb78ee047b9b12d096d40e3be265969d4c1f8"
                },
                {
                  "fixed": "551672981fe227122258a25a385a05f5c0746ad6"
                },
                {
                  "fixed": "f50433f2603def08b21a4bf2fd238687fb5cbde9"
                },
                {
                  "fixed": "847eeb6c0efcd76c7def73857cf798a4fcd8f79b"
                },
                {
                  "fixed": "709db4b476e254579d9c48ec34d397a41ca0c407"
                },
                {
                  "fixed": "46dbda27b028d78087667e8280966b99cec015ca"
                },
                {
                  "fixed": "c4af8a98bb52825a5331ae1d0604c0ea6956ba4b"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.13.4"
                },
                {
                  "fixed": "5.14"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "341db343768bc44f3512facc464021730d64071c"
                }
              ]
            }
          ],
          "versions": [
            "v5.13.19",
            "v5.13.18",
            "v5.13.17",
            "v5.13.16",
            "v5.13.15",
            "v5.13.14",
            "v5.13.13",
            "v5.13.12",
            "v5.13.11",
            "v5.13.10",
            "v5.13.9",
            "v5.13.8",
            "v5.13.7",
            "v5.13.6",
            "v5.13.5",
            "v5.13.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45946.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.202"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.165"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "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"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45946.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.855417376Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/43cbb78ee047b9b12d096d40e3be265969d4c1f8",
        "https://git.kernel.org/stable/c/46dbda27b028d78087667e8280966b99cec015ca",
        "https://git.kernel.org/stable/c/551672981fe227122258a25a385a05f5c0746ad6",
        "https://git.kernel.org/stable/c/709db4b476e254579d9c48ec34d397a41ca0c407",
        "https://git.kernel.org/stable/c/847eeb6c0efcd76c7def73857cf798a4fcd8f79b",
        "https://git.kernel.org/stable/c/c4af8a98bb52825a5331ae1d0604c0ea6956ba4b",
        "https://git.kernel.org/stable/c/f50433f2603def08b21a4bf2fd238687fb5cbde9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45946.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45946",
        "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-2026-45946.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45946",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 510268,
  "published_at": "2026-05-27T12:18:02.708+00:00"
}