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CVE-2026-89463 (GCVE-0-2026-89463)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00
VLAI
Title
power: supply: ucs1002: fix use-after-free on remove
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: ucs1002: fix use-after-free on remove ucs1002 has no remove callback, so unbind runs entirely through devm. The alert IRQ handler queues the health_poll delayed work, and the work reschedules itself while the chip reports a bad-health condition. devm frees the alert IRQ, which only synchronizes the handler; it does not cancel the delayed work, which can then run after devm frees the driver data and dereference it. Register health_poll with devm_delayed_work_autocancel() before the alert IRQ is requested. devm then frees the IRQ before cancelling the work, so the handler can no longer queue it and the work is cancelled before the driver data is freed. This issue was found by an in-house static analysis tool.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 00c19f8a9a58a318a76fd6f735a8aab3f8ead393 (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < a9a7bb801c443a4d9fc623c4a47deb53accb70bb (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 2ec4d203ecb06d327af67e32097fe8f774838a40 (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 4ca2a4678202f15eb790eb7f1d562061709caea7 (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 39b60d615dfa1725c235351fb12bc72e5f8a8d32 (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 35242c93d35f391afdc84cef6236b8ad57f1df24 (git)
Affected: 81196e2e57fc5b88f6b8ca98372a3dde047aa49d , < 609af0ceeaefdfa42cd01dd060b20f2e41f9a232 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: ucs1002: fix use-after-free on remove\n\nucs1002 has no remove callback, so unbind runs entirely through devm.\nThe alert IRQ handler queues the health_poll delayed work, and the work\nreschedules itself while the chip reports a bad-health condition.  devm\nfrees the alert IRQ, which only synchronizes the handler; it does not\ncancel the delayed work, which can then run after devm frees the driver\ndata and dereference it.\n\nRegister health_poll with devm_delayed_work_autocancel() before the\nalert IRQ is requested.  devm then frees the IRQ before cancelling the\nwork, so the handler can no longer queue it and the work is cancelled\nbefore the driver data is freed.\n\nThis issue was found by an in-house static analysis tool."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:02.113Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/609af0ceeaefdfa42cd01dd060b20f2e41f9a232"
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    "datePublished": "2026-09-11T19:43:24.629Z",
    "dateReserved": "2026-09-11T19:38:34.708Z",
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    "state": "PUBLISHED"
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      "date": "2026-09-15",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T05:35:47+00:00",
      "cve": "CVE-2026-89463",
      "id": "CVE-2026-89463",
      "initial_release_date": "2026-09-11T19:43:24.629000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel ucs1002 driver: Use-after-free vulnerability on device removal",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89463.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:03:29Z",
      "cve": "CVE-2026-89463",
      "id": "CVE-2026-89463",
      "initial_release_date": "2026-09-12T16:28:05Z",
      "product_status:known_affected": "96",
      "product_status:known_not_affected": "257",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89463",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89463.json",
      "version": "4"
    }
  }
}



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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

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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.