{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bc69d10665690492421d926b1cd9a7a36bffd691"
            },
            {
              "fixed": "ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b"
            },
            {
              "fixed": "c5ebb06c7e24d531b68707168e04698859d642bc"
            },
            {
              "fixed": "104d100212396801f1d9d388282f746e23e2bfd6"
            },
            {
              "fixed": "ff268cd9ccbce6472a0658791b417bf11c31ee39"
            },
            {
              "fixed": "1ff3f528e67d20e2b1483dcaba899dc7832b2e6b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.6.144"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.95"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.38"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63797.json"
  },
  "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's 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": "CVE-2026-63797",
  "modified": "2026-07-21T03:41:48.450232112Z",
  "published": "2026-07-19T12:02:05.227Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63797.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63797"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rpmsg: char: Fix use-after-free on probe error path"
}