{
  "cveId": "CVE-2024-42293",
  "url": "https://patchblox.com/security/cve/CVE-2024-42293",
  "summary": "CVE-2024-42293 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-42293, released August 17, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  arm64: mm: Fix lockless walks with static and dy...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  arm64: mm: Fix lockless walks with static and dynamic page-table folding  Lina reports random oopsen originating from the fast GUP code when 16K pages are used with 4-level page-tables, the fourth level being folded at runtime due to lack of LPA2.  In this configuration, the generic implementation of p4d_offset_lockless() will return a \u0027p4d_t *\u0027 corresponding to the \u0027pgd_t\u0027 allocated on the stack of the caller, gup_fast_pgd_range(). This is normally fine, but when the fourth level of page-table is folded at runtime, pud_offset_lockless() will offset from the address of the \u0027p4d_t\u0027 to calculate the address of the PUD in the same page-table page. This results in a stray stack read when the \u0027p4d_t\u0027 has been allocated on the stack and can send the walker into the weeds.  Fix the problem by providing our own definition of p4d_offset_lockless() when CONFIG_PGTABLE_LEVELS \u003C= 4 which returns the real page-table pointer rather than the address of the local stack variable.",
  "published": "2024-08-17T09:15:09Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00203,
  "epssPercentile": 0.10343,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.10.3-1",
      "fix": "DEBIAN-CVE-2024-42293",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-42293",
      "released": "2024-08-17T09:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.10.3-1",
      "fix": "DEBIAN-CVE-2024-42293",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-42293",
      "released": "2024-08-17T09:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}