{
  "cveId": "CVE-2026-53288",
  "url": "https://patchblox.com/security/cve/CVE-2026-53288",
  "summary": "CVE-2026-53288 is fixed in 37 products on 1 platform, first by ALAS2023-2026-1894, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  arm64: Reserve an extra page for early kernel ma...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  arm64: Reserve an extra page for early kernel mapping  The final part of [data, end) segment may overflow into the next page of init_pg_end[1] which is the gap page before early_init_stack[2]:  [1] crash_arm64_v9.0.1\u003E vtop ffffffed00601000 VIRTUAL           PHYSICAL ffffffed00601000  83401000  PAGE DIRECTORY: ffffffecffd62000    PGD: ffffffecffd62da0 =\u003E 10000000833fb003    PMD: ffffff80033fb018 =\u003E 10000000833fe003    PTE: ffffff80033fe008 =\u003E 68000083401f03   PAGE: 83401000       PTE        PHYSICAL  FLAGS 68000083401f03  83401000  (VALID|SHARED|AF|NG|PXN|UXN)        PAGE       PHYSICAL      MAPPING       INDEX CNT FLAGS fffffffec00d0040 83401000                0        0  1 4000 reserved  [2] ffffffed002c8000 (r) __pi__data ffffffed0054e000 (d) __pi___bss_start ffffffed005f5000 (b) __pi_init_pg_dir ffffffed005fe000 (b) __pi_init_pg_end ffffffed005ff000 (B) early_init_stack ffffffed00608000 (b) __pi__end  For 4K pages, the early kernel mapping may use 2MB block entries but the kernel segments are only 64KB aligned. Segment boundaries that fall within a 2MB block therefore require a PTE table so that different attributes can be applied on either side of the boundary.  KERNEL_SEGMENT_COUNT still correctly counts the five permanent kernel VMAs registered by declare_kernel_vmas(). However, since commit 5973a62efa34 (\u0022arm64: map [_text, _stext) virtual address range non-executable\u002Bread-only\u0022), the early mapper also maps [_text, _stext) separately from [_stext, _etext). This adds one more early-only split and can require one more page-table page than the existing EARLY_SEGMENT_EXTRA_PAGES allowance reserves.  Increase the 4K-page early mapping allowance by one page to cover that additional split.  [catalin.marinas@arm.com: rewrote part of the commit log] [catalin.marinas@arm.com: expanded the code comment]",
  "published": "2026-06-22T09:00:00Z",
  "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": 0.00162,
  "epssPercentile": 0.05384,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.92-122.166.amzn2023",
      "fix": "ALAS2023-2026-1894",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1894",
      "released": "2026-06-22T09:00:00Z"
    },
    {
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      "product": "bpftool6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.92-122.166.amzn2023",
      "fix": "ALAS2023-2026-1894",
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      "released": "2026-06-22T09:00:00Z"
    },
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1866",
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      "released": "2026-06-22T09:00:00Z"
    },
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      "fix": "ALAS2023-2026-1866",
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      "released": "2026-06-22T09:00:00Z"
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      "fix": "ALAS2023-2026-1894",
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}