ghsa-442r-3r9f-48cm
Vulnerability from github
Published
2022-05-24 17:27
Modified
2023-02-03 00:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2020-25221"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-672"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-09-10T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.",
  "id": "GHSA-442r-3r9f-48cm",
  "modified": "2023-02-03T00:30:17Z",
  "published": "2022-05-24T17:27:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25221"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20201001-0003"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2020/09/08/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2020/09/10/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/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.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.