ghsa-7gv2-7hhr-4fm9
Vulnerability from github
Published
2025-10-01 12:30
Modified
2025-10-01 12:30
Details

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

rpmsg: char: Avoid double destroy of default endpoint

The rpmsg_dev_remove() in rpmsg_core is the place for releasing this default endpoint.

So need to avoid destroying the default endpoint in rpmsg_chrdev_eptdev_destroy(), this should be the same as rpmsg_eptdev_release(). Otherwise there will be double destroy issue that ept->refcount report warning:

refcount_t: underflow; use-after-free.

Call trace: refcount_warn_saturate+0xf8/0x150 virtio_rpmsg_destroy_ept+0xd4/0xec rpmsg_dev_remove+0x60/0x70

The issue can be reproduced by stopping remoteproc before closing the /dev/rpmsgX.

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-50421"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Avoid double destroy of default endpoint\n\nThe rpmsg_dev_remove() in rpmsg_core is the place for releasing\nthis default endpoint.\n\nSo need to avoid destroying the default endpoint in\nrpmsg_chrdev_eptdev_destroy(), this should be the same as\nrpmsg_eptdev_release(). Otherwise there will be double destroy\nissue that ept-\u003erefcount report warning:\n\nrefcount_t: underflow; use-after-free.\n\nCall trace:\n refcount_warn_saturate+0xf8/0x150\n virtio_rpmsg_destroy_ept+0xd4/0xec\n rpmsg_dev_remove+0x60/0x70\n\nThe issue can be reproduced by stopping remoteproc before\nclosing the /dev/rpmsgX.",
  "id": "GHSA-7gv2-7hhr-4fm9",
  "modified": "2025-10-01T12:30:27Z",
  "published": "2025-10-01T12:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50421"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f20ef7a845c2c8d7ec82ecffa20d95cab5ecfeb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/467233a4ac29b215d492843d067a9f091e6bf0c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef828a39d6a7028836eaf37df3ad568c8c2dd6f9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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