{
  "cveId": "CVE-2026-53047",
  "url": "https://patchblox.com/security/cve/CVE-2026-53047",
  "summary": "CVE-2026-53047 is fixed in 70 products on 1 platform, first by ALAS2023-2026-1882, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "efi/capsule-loader: fix incorrect sizeof in phys array reallocation",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  efi/capsule-loader: fix incorrect sizeof in phys array reallocation  The krealloc() call for cap_info-\u003Ephys in __efi_capsule_setup_info() uses sizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be causing an undersized allocation.  The allocation is also inconsistent with the initial array allocation in efi_capsule_open() that allocates one entry with sizeof(phys_addr_t), and the efi_capsule_write() function that stores phys_addr_t values (not pointers) via page_to_phys().  On 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this goes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but pointers are 32-bit, this allocates half the required space, which might lead to a heap buffer overflow when storing physical addresses.  This is similar to the bug fixed in commit fccfa646ef36 (\u0022efi/capsule-loader: fix incorrect allocation size\u0022) which fixed the same issue at the initial allocation site.",
  "published": "2026-06-22T09:00:00Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00176,
  "epssPercentile": 0.07092,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53047",
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