GHSA-86GP-V777-H747

Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-20 15:31
VLAI
Details

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

rpmsg: char: Fix use-after-free on probe error path

rpmsg_chrdev_probe() stores the newly allocated eptdev in the default endpoint's priv pointer before calling rpmsg_chrdev_eptdev_add(). If rpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while the default endpoint may still dispatch callbacks with the stale priv pointer.

Avoid publishing eptdev through the default endpoint until rpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv pointer is published should be ignored by rpmsg_ept_cb(). Flow-control updates can hit rpmsg_ept_flow_cb() in the same window, so make both callbacks return success when priv is NULL.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-63797"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T12:16:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Fix use-after-free on probe error path\n\nrpmsg_chrdev_probe() stores the newly allocated eptdev in the default\nendpoint\u0027s priv pointer before calling rpmsg_chrdev_eptdev_add(). If\nrpmsg_chrdev_eptdev_add() then fails, its error path frees eptdev while\nthe default endpoint may still dispatch callbacks with the stale priv\npointer.\n\nAvoid publishing eptdev through the default endpoint until\nrpmsg_chrdev_eptdev_add() succeeds. Messages received before the priv\npointer is published should be ignored by rpmsg_ept_cb(). Flow-control\nupdates can hit rpmsg_ept_flow_cb() in the same window, so make both\ncallbacks return success when priv is NULL.",
  "id": "GHSA-86gp-v777-h747",
  "modified": "2026-07-20T15:31:46Z",
  "published": "2026-07-19T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63797"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

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.