GHSA-GFFW-PPMC-P7R6

Vulnerability from github – Published: 2022-05-13 01:19 – Updated: 2022-05-13 01:19
VLAI
Details

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2018-18281"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-459"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-10-30T18:29:00Z",
    "severity": "HIGH"
  },
  "details": "Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.",
  "id": "GHSA-gffw-ppmc-p7r6",
  "modified": "2022-05-13T01:19:33Z",
  "published": "2022-05-13T01:19:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18281"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3880-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3880-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-5"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-4"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-3"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3871-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3835-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3832-1"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78"
    },
    {
      "type": "WEB",
      "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1695"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0179"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0103"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0100"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0036"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2043"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2029"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0831"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2018/10/29/5"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/105761"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106503"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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