CVE-2026-74441 (GCVE-0-2026-74441)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:26 – Updated: 2026-08-23 12:47
VLAI
Title
usb: typec: ucsi: Fix race condition and ordering in port unregistration
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Fix race condition and ordering in port unregistration A synchronization issue exists during port unregistration where pending partner work items can race against workqueue destruction, leading to use-after-free conditions: cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:__queue_work+0x83/0x4a0 Call Trace: <IRQ> __cfi_delayed_work_timer_fn+0x10/0x10 run_timer_softirq+0x3b6/0xbd0 sched_clock_cpu+0xc/0x110 irq_exit_rcu+0x18d/0x330 fred_sysvec_apic_timer_interrupt+0x5e/0x80 Fix this by ensuring strict ordering and proper serialization during teardown: 1. Move ucsi_unregister_partner() to the beginning of the teardown sequence and protect it under the connector mutex lock. 2. Ensure all pending partner tasks are explicitly flushed and finished before the workqueue is destroyed. 3. Switch from mod_delayed_work() to a cancel_delayed_work() and queue_delayed_work() sequence. This guarantees that items currently marked as pending won't be scheduled an additional time, preventing a double release of resources which leads to the following crash: Oops: general protection fault, probably for non-canonical address 0xdead000000000122: 0000 [#1] SMP NOPTI Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker RIP: 0010:ucsi_poll_worker+0x65/0x1e0 Call Trace: <TASK> process_scheduled_works+0x218/0x6d0 worker_thread+0x188/0x3f0 __cfi_worker_thread+0x10/0x10 kthread+0x226/0x2a0 To ensure these rules are applied identically across both the normal teardown and the ucsi_init() error paths, consolidate the cleanup logic into a new helper, ucsi_unregister_port().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < 7b63c680ff605f60f056e5f2c323f1a602aee182 (git)
Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < 07f8aaffee705e552c1f723ac8bf7eb137ad59c2 (git)
Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < 11483d80267db97fbe49f2df66385434256cc3b0 (git)
Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < 3f7b3728dd9011c915cbeaea77274ebe8366550d (git)
Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < bc7a0f721123ea260a42f1ded06dab844ba49434 (git)
Affected: b9aa02ca39a49740926c2c450a1505a4a0f8954a , < 7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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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\nusb: typec: ucsi: Fix race condition and ordering in port unregistration\n\nA synchronization issue exists during port unregistration where pending\npartner work items can race against workqueue destruction, leading to\nuse-after-free conditions:\n\n  cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:__queue_work+0x83/0x4a0\n  Call Trace:\n    \u003cIRQ\u003e\n    __cfi_delayed_work_timer_fn+0x10/0x10\n    run_timer_softirq+0x3b6/0xbd0\n    sched_clock_cpu+0xc/0x110\n    irq_exit_rcu+0x18d/0x330\n    fred_sysvec_apic_timer_interrupt+0x5e/0x80\n\nFix this by ensuring strict ordering and proper serialization during\nteardown:\n\n1. Move ucsi_unregister_partner() to the beginning of the teardown\nsequence and protect it under the connector mutex lock.\n2. Ensure all pending partner tasks are explicitly flushed and finished\nbefore the workqueue is destroyed.\n3. Switch from mod_delayed_work() to a cancel_delayed_work() and\nqueue_delayed_work() sequence. This guarantees that items currently marked\nas pending won\u0027t be scheduled an additional time, preventing a double\nrelease of resources which leads to the following crash:\n\n  Oops: general protection fault, probably for non-canonical address\n    0xdead000000000122: 0000 [#1] SMP NOPTI\n  Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker\n  RIP: 0010:ucsi_poll_worker+0x65/0x1e0\n  Call Trace:\n  \u003cTASK\u003e\n    process_scheduled_works+0x218/0x6d0\n    worker_thread+0x188/0x3f0\n    __cfi_worker_thread+0x10/0x10\n    kthread+0x226/0x2a0\n\nTo ensure these rules are applied identically across both the normal\nteardown and the ucsi_init() error paths, consolidate the cleanup logic\ninto a new helper, ucsi_unregister_port()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:47:17.900Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/7b63c680ff605f60f056e5f2c323f1a602aee182"
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          "url": "https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0"
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          "url": "https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434"
        },
        {
          "url": "https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261"
        }
      ],
      "title": "usb: typec: ucsi: Fix race condition and ordering in port unregistration",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74441",
    "datePublished": "2026-08-15T12:26:49.359Z",
    "dateReserved": "2026-08-15T05:44:03.897Z",
    "dateUpdated": "2026-08-23T12:47:17.900Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "cve": "CVE-2026-74441",
      "date": "2026-08-28",
      "epss": "0.00173",
      "percentile": "0.06787"
    },
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      "cve": "CVE-2026-74441",
      "id": "msrc_CVE-2026-74441",
      "initial_release_date": "2026-08-23T15:04:09.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "usb: typec: ucsi: Fix race condition and ordering in port unregistration",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74441.json",
      "version": "1"
    },
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Move ucsi_unregister_partner() to the beginning of the teardown\\nsequence and protect it under the connector mutex lock.\\n2. Ensure all pending partner tasks are explicitly flushed and finished\\nbefore the workqueue is destroyed.\\n3. Switch from mod_delayed_work() to a cancel_delayed_work() and\\nqueue_delayed_work() sequence. This guarantees that items currently marked\\nas pending won\u0027t be scheduled an additional time, preventing a double\\nrelease of resources which leads to the following crash:\\n\\n  Oops: general protection fault, probably for non-canonical address\\n    0xdead000000000122: 0000 [#1] SMP NOPTI\\n  Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker\\n  RIP: 0010:ucsi_poll_worker+0x65/0x1e0\\n  Call Trace:\\n  \u003cTASK\u003e\\n    process_scheduled_works+0x218/0x6d0\\n    worker_thread+0x188/0x3f0\\n    __cfi_worker_thread+0x10/0x10\\n    kthread+0x226/0x2a0\\n\\nTo ensure these rules are applied identically across both the normal\\nteardown and the ucsi_init() error paths, consolidate the cleanup logic\\ninto a new helper, ucsi_unregister_port().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"7b63c680ff605f60f056e5f2c323f1a602aee182\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"07f8aaffee705e552c1f723ac8bf7eb137ad59c2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"11483d80267db97fbe49f2df66385434256cc3b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"3f7b3728dd9011c915cbeaea77274ebe8366550d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"bc7a0f721123ea260a42f1ded06dab844ba49434\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b9aa02ca39a49740926c2c450a1505a4a0f8954a\",\"lessThan\":\"7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.151\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.103\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.44\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.8\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07f8aaffee705e552c1f723ac8bf7eb137ad59c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f7b3728dd9011c915cbeaea77274ebe8366550d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7b63c680ff605f60f056e5f2c323f1a602aee182\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-21T09:56:09+00:00",
      "cve": "CVE-2026-74441",
      "id": "CVE-2026-74441",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: typec: ucsi: Fix race condition and ordering in port unregistration",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74441.json",
      "version": "3"
    }
  }
}



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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.
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  • 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.