ghsa-qrgv-ph7p-j565
Vulnerability from github
Published
2022-05-14 02:03
Modified
2022-05-14 02:03
Severity ?
5.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).

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{
  "affected": [],
  "aliases": [
    "CVE-2018-1000200"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-06-05T13:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process\u0027s final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper\u0027s unmap_page_range() since the vma\u0027s VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).",
  "id": "GHSA-qrgv-ph7p-j565",
  "modified": "2022-05-14T02:03:25Z",
  "published": "2022-05-14T02:03:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000200"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2948"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/cve-2018-1000200"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27ae357fa82be5ab73b2ef8d39dcb8ca2563483a"
    },
    {
      "type": "WEB",
      "url": "https://marc.info/?l=linux-kernel\u0026m=152400522806945"
    },
    {
      "type": "WEB",
      "url": "https://marc.info/?l=linux-kernel\u0026m=152460926619256"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-3"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/oss-sec/2018/q2/67"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104397"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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