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CVE-2026-46270 (GCVE-0-2026-46270)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:50 – Updated: 2026-08-05 12:30
VLAI
Title
power: supply: rt9455: Fix use-after-free in power_supply_changed()
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: 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
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < 62d753b916bd500bb269b7078cdab73198ab4718 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < a39f8f06216f73ef40e71e2fe4ad071964c1fd36 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < af261f218a7606f93d2c786353d60bb4feb56ef0 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < 2178dc65d45e2f7bcaa8af8d80d100419bdab251 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < 64e15155095f39f4dec9b4659da1238ef8fc54d4 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < 721449a15170fc5f028a7576d7f65b9f60d53482 (git)
Affected: e86d69dd786e94046b8f5be7df1b9a8226a40b2a , < e2febe375e5ea5afed92f4cd9711bde8f24ee6d2 (git)
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Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (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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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: rt9455: 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."
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        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "lang": "en",
              "value": "AV:L - Exploitation requires local driver teardown (module unload, sysfs unbind, or shutdown/reboot) that runs `devres_release_all()`; the vulnerable `power_supply_changed()` path is only reachable from the on-chip IRQ handler during that window, not from any network-facing protocol.\nAC:L - An attacker who can initiate driver removal can repeatedly assert charger interrupts (USB plug/unplug, charge events) to hit the narrow race between `power_supply_unregister()` and IRQ release; this is a standard attacker-controlled UAF race, not a layout-dependent condition.\nPR:N - On battery-powered embedded/mobile platforms with this IC, an attacker with brief physical possession can force power-off/reboot (no Linux account or capability) while manipulating the charging port to fire IRQs during devm teardown; explicit unbind/rmmod also works but is not the only path.\nUI:N - No victim interaction is required beyond the attacker\u2019s own physical control of the device and charging port; exploitation does not depend on the victim opening files, mounting filesystems, or approving prompts.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the kernel security boundary; it does not cross VM, container, or IOMMU isolation boundaries.\nC:H - The IRQ handler calls `power_supply_changed()` on a freed `struct power_supply`, performing spinlock operations and `schedule_work()` on freed heap memory, which is a classic UAF that can be turned into arbitrary kernel memory disclosure.\nI:H - The same UAF writes to freed object fields (`changed`, locks, workqueue) and can be combined with heap grooming for arbitrary kernel writes or control-flow hijack, as noted by the fix author (\u201csilently corrupts the memory\u201d).\nA:H - Use-after-free in interrupt context typically causes immediate kernel oops/panic or silent memory corruption; the commit explicitly states this \u201cusually crashes the system.\u201d"
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        "dateUpdated": "2026-08-05T12:30:54.591Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2"
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      "title": "power: supply: rt9455: Fix use-after-free in power_supply_changed()",
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    "datePublished": "2026-06-03T15:50:12.537Z",
    "dateReserved": "2026-05-13T15:03:33.109Z",
    "dateUpdated": "2026-08-05T12:30:54.591Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46270\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-03T18:16:28.733\",\"lastModified\":\"2026-07-22T20:10:00.127\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npower: supply: rt9455: 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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\npower: supply: rt9455: Correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en power_supply_changed()\\n\\nUsar la variante \u0027devm_\u0027 para solicitar IRQ _antes_ de la variante \u0027devm_\u0027 para asignar/registrar el manejador \u0027power_supply\u0027, significa que el manejador \u0027power_supply\u0027 ser\u00e1 desasignado/dado de baja _antes_ del gestor de interrupciones (ya que \u0027devm_\u0027 desasigna naturalmente en orden inverso de asignaci\u00f3n). Esto significa que durante la eliminaci\u00f3n, existe una condici\u00f3n de carrera donde una interrupci\u00f3n puede dispararse justo _despu\u00e9s_ de que el manejador \u0027power_supply\u0027 haya sido liberado, pero justo _antes_ de que se haya ejecutado la baja correspondiente del gestor de IRQ.\\n\\nEsto llevar\u00e1 a que el gestor de IRQ llame a \u0027power_supply_changed()\u0027 con un manejador \u0027power_supply\u0027 liberado. Lo que usualmente bloquea el sistema o de otra manera corrompe silenciosamente la memoria...\\n\\nTenga en cuenta que existe una situaci\u00f3n similar que tambi\u00e9n puede ocurrir durante \u0027probe()\u0027; la posibilidad de que una interrupci\u00f3n se dispare _antes_ de registrar el manejador \u0027power_supply\u0027. Esto entonces llevar\u00eda a la desagradable situaci\u00f3n de usar el manejador \u0027power_supply\u0027 sin inicializar en \u0027power_supply_changed()\u0027.\\n\\nCorrija este uso despu\u00e9s de liberaci\u00f3n con condici\u00f3n de carrera asegur\u00e1ndose de que la IRQ sea solicitada _despu\u00e9s_ del registro del manejador \u0027power_supply\u0027.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/power/supply/rt9455_charger.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"62d753b916bd500bb269b7078cdab73198ab4718\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"a39f8f06216f73ef40e71e2fe4ad071964c1fd36\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"af261f218a7606f93d2c786353d60bb4feb56ef0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"2178dc65d45e2f7bcaa8af8d80d100419bdab251\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"64e15155095f39f4dec9b4659da1238ef8fc54d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"721449a15170fc5f028a7576d7f65b9f60d53482\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e86d69dd786e94046b8f5be7df1b9a8226a40b2a\",\"lessThan\":\"e2febe375e5ea5afed92f4cd9711bde8f24ee6d2\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/power/supply/rt9455_charger.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.252\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.202\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.165\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.128\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.75\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.14\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.4\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2\",\"versionEndExcluding\":\"5.10.252\",\"matchCriteriaId\":\"C8804750-9CF7-4B7E-9AF2-6417C12ED933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.202\",\"matchCriteriaId\":\"4002FC2B-1456-4666-B240-0EBF590C4671\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"851E9353-6C09-4CC9-877E-E09DB164A3C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"BCE16369-98ED-41CF-8995-DFDC10B288D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.14\",\"matchCriteriaId\":\"BF463CB7-1F58-4607-B847-77ED23E4B9B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.4\",\"matchCriteriaId\":\"672A3E79-EC03-479D-8503-361DFBDC8092\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/721449a15170fc5f028a7576d7f65b9f60d53482\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:41:56+00:00",
      "cve": "CVE-2026-46270",
      "id": "CVE-2026-46270",
      "initial_release_date": "2026-06-03T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: power: supply: rt9455: Fix use-after-free in power_supply_changed()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46270.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:10:24Z",
      "cve": "CVE-2026-46270",
      "id": "CVE-2026-46270",
      "initial_release_date": "2026-06-04T02:21:40Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "699",
      "product_status:known_not_affected": "21",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46270",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46270.json",
      "version": "10"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.