CVE-2026-45938 (GCVE-0-2026-45938)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17
VLAI
Title
power: supply: pm8916_lbc: Fix use-after-free in power_supply_changed()
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: 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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < dbe579e620ef0f53db490ec79a8566e4ea8918ac (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < 08e674e9862a2db46fb234eb7c5442455ece0131 (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < d7d31fc99d248d5f47588f50dce5c7599c991c6a (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < b7508129978ae1e2ed9b0410396abc05def9c4eb (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/pm8916_lbc.c"
          ],
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          "vendor": "Linux",
          "versions": [
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "6.7"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.0",
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            }
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        }
      ],
      "cpeApplicability": [
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            {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "6.7",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: pm8916_lbc: 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": "2026-05-27T12:17:54.812Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dbe579e620ef0f53db490ec79a8566e4ea8918ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/08e674e9862a2db46fb234eb7c5442455ece0131"
        },
        {
          "url": "https://git.kernel.org/stable/c/d7d31fc99d248d5f47588f50dce5c7599c991c6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b7508129978ae1e2ed9b0410396abc05def9c4eb"
        }
      ],
      "title": "power: supply: pm8916_lbc: 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-2026-45938",
    "datePublished": "2026-05-27T12:17:54.812Z",
    "dateReserved": "2026-05-13T15:03:33.087Z",
    "dateUpdated": "2026-05-27T12:17:54.812Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "cve": "CVE-2026-45938",
      "date": "2026-05-29",
      "epss": "0.00018",
      "percentile": "0.04919"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-45938\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-27T14:17:09.977\",\"lastModified\":\"2026-05-27T14:48:03.013\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npower: supply: pm8916_lbc: 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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08e674e9862a2db46fb234eb7c5442455ece0131\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7508129978ae1e2ed9b0410396abc05def9c4eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7d31fc99d248d5f47588f50dce5c7599c991c6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbe579e620ef0f53db490ec79a8566e4ea8918ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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