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CVE-2026-89469 (GCVE-0-2026-89469)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00
VLAI
Title
power: supply: lp8727: fix use-after-free in lp8727_release_irq()
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: lp8727: fix use-after-free in lp8727_release_irq() lp8727_isr_func(), the threaded IRQ handler, is the only caller that arms pchg->work via schedule_delayed_work(). lp8727_release_irq() currently cancels the work before freeing the IRQ, so an IRQ delivered in between can re-arm the work through the threaded handler. After .remove returns the devm layer frees pchg while lp8727_delayed_func() may still run and dereference it. Free the IRQ first so the threaded handler is quiesced and can no longer queue work, then cancel the delayed work to drain the final generation. This issue was found by an in-house static analysis tool.
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: d71fda01610269e3aaedd451f8d3e34cdf550036 , < 1321a4e6247164312eabc6d07f88572da2ee308c (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < dc1dc2837f8e53bde2f16d52a63f4142e21757f1 (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < 035cc6bc4d412dd4302862e8f859b784fcd4653b (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < 6f0ce09d60a0e4fab6f9ebe8294750481f0c19dd (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < 80d4e40a85ba524e66c8c748aa7bb19eaf2f69df (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < ab6b1ad710bed7931540733ce145493fece8ceef (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < 6ab3128292df67295de1b2a86f21d89cf6612a7e (git)
Affected: d71fda01610269e3aaedd451f8d3e34cdf550036 , < ceb6ac43b0f591722401922ceb958ce2616935e0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.10.270 , ≤ 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)
guessed Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: lp8727: fix use-after-free in lp8727_release_irq()\n\nlp8727_isr_func(), the threaded IRQ handler, is the only caller that arms\npchg-\u003ework via schedule_delayed_work().  lp8727_release_irq() currently\ncancels the work before freeing the IRQ, so an IRQ delivered in between\ncan re-arm the work through the threaded handler.  After .remove returns\nthe devm layer frees pchg while lp8727_delayed_func() may still run and\ndereference it.\n\nFree the IRQ first so the threaded handler is quiesced and can no longer\nqueue work, then cancel the delayed work to drain the final generation.\n\nThis issue was found by an in-house static analysis tool."
        }
      ],
      "metrics": [
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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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is reached only when the onboard I2C LP8727 Micro/Mini USB charger is torn down locally (sysfs unbind, rmmod, or shutdown/reboot) so lp8727_delayed_func() runs after devm frees pchg; IRQs come from the chip INT GPIO, not from any network protocol.\nAC:L - The attacker controls both sides of the race: they start teardown while USB plug/unplug IRQs re-arm pchg-\u003ework after cancel_delayed_work_sync() and before free_irq(); the 270ms debounce then runs lp8727_delayed_func() on already-freed memory, so the UAF is retriable rather than layout-dependent.\nPR:N - On battery-powered devices with this USB charger IC, brief physical possession is enough to force power-off/reboot with no Linux account while charger IRQs fire during remove, as for the prior RT9455 teardown UAFs (CVE-2026-46270, CVE-2026-89465); CAP_SYS_ADMIN unbind is only an alternate path.\nUI:N - No victim action is required; the attacker performs teardown and any charging-port manipulation themselves, without the victim opening files, mounting filesystems, or approving prompts.\nS:U - The UAF corrupts kernel heap inside the same OS security authority; it is not a VM escape, IOMMU/DMA isolation bypass, or sandbox breakout.\nC:H - lp8727_delayed_func() recovers the freed lp8727_chg via container_of() and reads client, lock, pdata, and psy pointers, a classic kernel heap UAF that enables arbitrary disclosure via slab reuse.\nI:H - The same callback writes pchg fields, issues I2C SMBus writes, and calls power_supply_changed() on freed ac/usb/batt objects (changed flag and schedule_work), enabling heap-spray arbitrary writes and control-flow hijack.\nA:H - Use-after-free of pchg and the unregistered power_supply objects from workqueue context causes a kernel oops or panic even when the UAF is not fully exploited."
            }
          ]
        }
      ],
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        "dateUpdated": "2026-09-14T12:00:06.392Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/1321a4e6247164312eabc6d07f88572da2ee308c"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc1dc2837f8e53bde2f16d52a63f4142e21757f1"
        },
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          "url": "https://git.kernel.org/stable/c/035cc6bc4d412dd4302862e8f859b784fcd4653b"
        },
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          "url": "https://git.kernel.org/stable/c/6f0ce09d60a0e4fab6f9ebe8294750481f0c19dd"
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          "url": "https://git.kernel.org/stable/c/ceb6ac43b0f591722401922ceb958ce2616935e0"
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      "title": "power: supply: lp8727: fix use-after-free in lp8727_release_irq()",
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    "datePublished": "2026-09-11T19:43:28.560Z",
    "dateReserved": "2026-09-11T19:38:34.709Z",
    "dateUpdated": "2026-09-14T12:00:06.392Z",
    "state": "PUBLISHED"
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      "date": "2026-09-16",
      "epss": "0.0014",
      "percentile": "0.03691"
    },
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      "cve": "CVE-2026-89469",
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      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "power: supply: lp8727: fix use-after-free in lp8727_release_irq()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89469.json",
      "version": "2"
    },
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After .remove returns\\nthe devm layer frees pchg while lp8727_delayed_func() may still run and\\ndereference it.\\n\\nFree the IRQ first so the threaded handler is quiesced and can no longer\\nqueue work, then cancel the delayed work to drain the final generation.\\n\\nThis issue was found by an in-house static analysis tool.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/power/supply/lp8727_charger.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"1321a4e6247164312eabc6d07f88572da2ee308c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"dc1dc2837f8e53bde2f16d52a63f4142e21757f1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"035cc6bc4d412dd4302862e8f859b784fcd4653b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"6f0ce09d60a0e4fab6f9ebe8294750481f0c19dd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"80d4e40a85ba524e66c8c748aa7bb19eaf2f69df\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"ab6b1ad710bed7931540733ce145493fece8ceef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"6ab3128292df67295de1b2a86f21d89cf6612a7e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d71fda01610269e3aaedd451f8d3e34cdf550036\",\"lessThan\":\"ceb6ac43b0f591722401922ceb958ce2616935e0\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/power/supply/lp8727_charger.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"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}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/035cc6bc4d412dd4302862e8f859b784fcd4653b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1321a4e6247164312eabc6d07f88572da2ee308c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ab3128292df67295de1b2a86f21d89cf6612a7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6f0ce09d60a0e4fab6f9ebe8294750481f0c19dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/80d4e40a85ba524e66c8c748aa7bb19eaf2f69df\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab6b1ad710bed7931540733ce145493fece8ceef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ceb6ac43b0f591722401922ceb958ce2616935e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dc1dc2837f8e53bde2f16d52a63f4142e21757f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-13T06:55:54+00:00",
      "cve": "CVE-2026-89469",
      "id": "CVE-2026-89469",
      "initial_release_date": "2026-09-11T19:43:28.560000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux Kernel: Memory corruption in lp8727 power supply driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89469.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:03:21Z",
      "cve": "CVE-2026-89469",
      "id": "CVE-2026-89469",
      "initial_release_date": "2026-09-12T16:27:58Z",
      "product_status:known_affected": "291",
      "product_status:known_not_affected": "62",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89469",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89469.json",
      "version": "4"
    }
  }
}



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  • 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.