Vulnerability-Lookup

CVE-2026-64329 (GCVE-0-2026-64329)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-07-25 08:49

Title

usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove The threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(), which on a connector-change event calls ucsi_connector_change() and schedules connector work. In ucsi_ccg_remove(), ucsi_destroy() frees uc->ucsi (kfree) before free_irq() is called, so a handler invocation already in flight may access the freed object after ucsi_destroy(). CPU 0 (remove) | CPU 1 (threaded IRQ) ucsi_destroy(uc->ucsi) | ccg_irq_handler() kfree(ucsi) // FREE | ucsi_notify_common(uc->ucsi) // USE Move free_irq() before ucsi_destroy() in the remove path. It is kept after ucsi_unregister(): ucsi_unregister() cancels connector work whose handler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(), which waits for a completion that is signalled from the IRQ handler, so the IRQ must stay active until that work has been cancelled. The probe error path already orders free_irq() before ucsi_destroy(). This bug was found by static analysis.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/f1adeb1ff8bef1467…
https://git.kernel.org/stable/c/99381e762273a2410…
https://git.kernel.org/stable/c/1a160076d3d0dcd4a…
https://git.kernel.org/stable/c/c32df11147822d22f…
https://git.kernel.org/stable/c/86c9ee928c4a370e3…
https://git.kernel.org/stable/c/f5c772b76bbd95de8…
https://git.kernel.org/stable/c/dbb500bad02146b38…
https://git.kernel.org/stable/c/1f0bdc2884b67de33…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < f1adeb1ff8bef1467d6961059810795d02bbad5d (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < 99381e762273a2410a3f0216000be32b013c0ea9 (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < 1a160076d3d0dcd4a98a4599ad96eec0790b099b (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < c32df11147822d22facee8fa30c2e8971d12f426 (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < 86c9ee928c4a370e323e432aaf8dca79c4ba7c85 (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < f5c772b76bbd95de8be51cf849c6098f6af6fcf9 (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < dbb500bad02146b388041877574829016591ddc8 (git) Affected: e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 , < 1f0bdc2884b67de337215079bba166df0cdf4ac5 (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove\n\nThe threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(),\nwhich on a connector-change event calls ucsi_connector_change() and\nschedules connector work.  In ucsi_ccg_remove(), ucsi_destroy() frees\nuc-\u003eucsi (kfree) before free_irq() is called, so a handler invocation\nalready in flight may access the freed object after ucsi_destroy().\n\n  CPU 0 (remove)            | CPU 1 (threaded IRQ)\n    ucsi_destroy(uc-\u003eucsi)  |   ccg_irq_handler()\n      kfree(ucsi) // FREE   |     ucsi_notify_common(uc-\u003eucsi) // USE\n\nMove free_irq() before ucsi_destroy() in the remove path.  It is kept\nafter ucsi_unregister(): ucsi_unregister() cancels connector work whose\nhandler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(),\nwhich waits for a completion that is signalled from the IRQ handler, so\nthe IRQ must stay active until that work has been cancelled.\n\nThe probe error path already orders free_irq() before ucsi_destroy().\n\nThis bug was found by static analysis."
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      "title": "usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove",
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In ucsi_ccg_remove(), ucsi_destroy() frees\\nuc-\u003eucsi (kfree) before free_irq() is called, so a handler invocation\\nalready in flight may access the freed object after ucsi_destroy().\\n\\n  CPU 0 (remove)            | CPU 1 (threaded IRQ)\\n    ucsi_destroy(uc-\u003eucsi)  |   ccg_irq_handler()\\n      kfree(ucsi) // FREE   |     ucsi_notify_common(uc-\u003eucsi) // USE\\n\\nMove free_irq() before ucsi_destroy() in the remove path.  It is kept\\nafter ucsi_unregister(): ucsi_unregister() cancels connector work whose\\nhandler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(),\\nwhich waits for a completion that is signalled from the IRQ handler, so\\nthe IRQ must stay active until that work has been cancelled.\\n\\nThe probe error path already orders free_irq() before ucsi_destroy().\\n\\nThis bug was found by static analysis.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi_ccg.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"f1adeb1ff8bef1467d6961059810795d02bbad5d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"99381e762273a2410a3f0216000be32b013c0ea9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"1a160076d3d0dcd4a98a4599ad96eec0790b099b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"c32df11147822d22facee8fa30c2e8971d12f426\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"86c9ee928c4a370e323e432aaf8dca79c4ba7c85\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"f5c772b76bbd95de8be51cf849c6098f6af6fcf9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"dbb500bad02146b388041877574829016591ddc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2\",\"lessThan\":\"1f0bdc2884b67de337215079bba166df0cdf4ac5\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/usb/typec/ucsi/ucsi_ccg.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
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      "cve": "CVE-2026-64329",
      "id": "CVE-2026-64329",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64329",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64329.json",
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}

GHSA-X9XH-344G-4QC3

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove

The threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(), which on a connector-change event calls ucsi_connector_change() and schedules connector work. In ucsi_ccg_remove(), ucsi_destroy() frees uc->ucsi (kfree) before free_irq() is called, so a handler invocation already in flight may access the freed object after ucsi_destroy().

CPU 0 (remove) | CPU 1 (threaded IRQ) ucsi_destroy(uc->ucsi) | ccg_irq_handler() kfree(ucsi) // FREE | ucsi_notify_common(uc->ucsi) // USE

Move free_irq() before ucsi_destroy() in the remove path. It is kept after ucsi_unregister(): ucsi_unregister() cancels connector work whose handler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(), which waits for a completion that is signalled from the IRQ handler, so the IRQ must stay active until that work has been cancelled.

The probe error path already orders free_irq() before ucsi_destroy().

This bug was found by static analysis.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64329"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove\n\nThe threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(),\nwhich on a connector-change event calls ucsi_connector_change() and\nschedules connector work.  In ucsi_ccg_remove(), ucsi_destroy() frees\nuc-\u003eucsi (kfree) before free_irq() is called, so a handler invocation\nalready in flight may access the freed object after ucsi_destroy().\n\n  CPU 0 (remove)            | CPU 1 (threaded IRQ)\n    ucsi_destroy(uc-\u003eucsi)  |   ccg_irq_handler()\n      kfree(ucsi) // FREE   |     ucsi_notify_common(uc-\u003eucsi) // USE\n\nMove free_irq() before ucsi_destroy() in the remove path.  It is kept\nafter ucsi_unregister(): ucsi_unregister() cancels connector work whose\nhandler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(),\nwhich waits for a completion that is signalled from the IRQ handler, so\nthe IRQ must stay active until that work has been cancelled.\n\nThe probe error path already orders free_irq() before ucsi_destroy().\n\nThis bug was found by static analysis.",
  "id": "GHSA-x9xh-344g-4qc3",
  "modified": "2026-07-25T12:31:31Z",
  "published": "2026-07-25T12:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64329"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64329 (GCVE-0-2026-64329)

GHSA-X9XH-344G-4QC3

Tags

Sightings

Nomenclature