CVE-2026-45902 (GCVE-0-2026-45902)
Vulnerability from cvelistv5
Published
2026-05-27 12:17
Modified
2026-05-27 12:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: 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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
Version: 32e4978bb920d047fe5de3ea42d176f267c01f63
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/bq256xx_charger.c"
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.12"
            },
            {
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "5.15.202",
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            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.6.128",
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              "status": "unaffected",
              "version": "6.12.75",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
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              "status": "unaffected",
              "version": "6.19.4",
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.1.165",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: bq256xx: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:17:10.508Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/81d3688c9a2158329391e08f2d0b8ba204216044"
        },
        {
          "url": "https://git.kernel.org/stable/c/74b5a88318db97d51bb40f774736553c2acd1514"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb5c743936edcebc51880eeb6bf04979b5c9438b"
        },
        {
          "url": "https://git.kernel.org/stable/c/83c27fdd696ac13d023ef7a0345301be93209c53"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b6fb0b6124f558131e502e3ffd03e6583b3ace6"
        },
        {
          "url": "https://git.kernel.org/stable/c/8796910131a32ff29275052df768ef022929a394"
        },
        {
          "url": "https://git.kernel.org/stable/c/8005843369723d9c8975b7c4202d1b85d6125302"
        }
      ],
      "title": "power: supply: bq256xx: Fix use-after-free in power_supply_changed()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45902",
    "datePublished": "2026-05-27T12:17:10.508Z",
    "dateReserved": "2026-05-13T15:03:33.084Z",
    "dateUpdated": "2026-05-27T12:17:10.508Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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