Vulnerability-Lookup

CVE-2026-53047 (GCVE-0-2026-53047)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29

Title

efi/capsule-loader: fix incorrect sizeof in phys array reallocation

Summary

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->phys 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 ("efi/capsule-loader: fix incorrect allocation size") which fixed the same issue at the initial allocation site.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/22022cd8851703a58…
https://git.kernel.org/stable/c/67adde6bfdfd563a5…
https://git.kernel.org/stable/c/608e1f7bc9d171ab2…
https://git.kernel.org/stable/c/8be69e9245f805566…
https://git.kernel.org/stable/c/5e185330d902b12fe…
https://git.kernel.org/stable/c/e0e6b14995fd6fa2c…
https://git.kernel.org/stable/c/ab3f7098a3a27175b…
https://git.kernel.org/stable/c/48a428215782321b5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 22022cd8851703a58f67615a17bc7e9e8682785b (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 67adde6bfdfd563a54b045d59aeb9a2d90c80697 (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 608e1f7bc9d171ab26c1fba288c97fc76363c27d (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 8be69e9245f805566bac68ffc8574b64735fd996 (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 5e185330d902b12fe8e6eb4b8514b5d736d8d66d (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < e0e6b14995fd6fa2c0df8c712d76ab32f0694c31 (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < ab3f7098a3a27175b91cfc947950f5c26855801b (git) Affected: f24c4d478013d82bd1b943df566fff3561d52864 , < 48a428215782321b56956974f23593e40ce84b7a (git) Affected: 95a362c9a6892085f714eb6e31eea6a0e3aa93bf (git) Affected: 4.14.13 , < 4.15 (semver)
Linux	Linux	Affected: 4.15 Unaffected: 0 , < 4.15 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/capsule-loader.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "22022cd8851703a58f67615a17bc7e9e8682785b",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "67adde6bfdfd563a54b045d59aeb9a2d90c80697",
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              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "608e1f7bc9d171ab26c1fba288c97fc76363c27d",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "8be69e9245f805566bac68ffc8574b64735fd996",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "5e185330d902b12fe8e6eb4b8514b5d736d8d66d",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "e0e6b14995fd6fa2c0df8c712d76ab32f0694c31",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
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              "status": "affected",
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            }
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        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/capsule-loader.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.14.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi/capsule-loader: fix incorrect sizeof in phys array reallocation\n\nThe krealloc() call for cap_info-\u003ephys in __efi_capsule_setup_info() uses\nsizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be\ncausing an undersized allocation.\n\nThe allocation is also inconsistent with the initial array allocation in\nefi_capsule_open() that allocates one entry with sizeof(phys_addr_t),\nand the efi_capsule_write() function that stores phys_addr_t values (not\npointers) via page_to_phys().\n\nOn 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this\ngoes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but\npointers are 32-bit, this allocates half the required space, which might\nlead to a heap buffer overflow when storing physical addresses.\n\nThis is similar to the bug fixed in commit fccfa646ef36 (\"efi/capsule-loader:\nfix incorrect allocation size\") which fixed the same issue at the initial\nallocation site."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:29:53.491Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b"
        },
        {
          "url": "https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697"
        },
        {
          "url": "https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b"
        },
        {
          "url": "https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a"
        }
      ],
      "title": "efi/capsule-loader: fix incorrect sizeof in phys array reallocation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53047",
    "datePublished": "2026-06-24T16:29:53.491Z",
    "dateReserved": "2026-06-09T07:44:35.381Z",
    "dateUpdated": "2026-06-24T16:29:53.491Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53047",
      "date": "2026-07-05",
      "epss": "0.00195",
      "percentile": "0.09372"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53047\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:16.533\",\"lastModified\":\"2026-06-24T17:17:16.533\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nefi/capsule-loader: fix incorrect sizeof in phys array reallocation\\n\\nThe krealloc() call for cap_info-\u003ephys in __efi_capsule_setup_info() uses\\nsizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be\\ncausing an undersized allocation.\\n\\nThe allocation is also inconsistent with the initial array allocation in\\nefi_capsule_open() that allocates one entry with sizeof(phys_addr_t),\\nand the efi_capsule_write() function that stores phys_addr_t values (not\\npointers) via page_to_phys().\\n\\nOn 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this\\ngoes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but\\npointers are 32-bit, this allocates half the required space, which might\\nlead to a heap buffer overflow when storing physical addresses.\\n\\nThis is similar to the bug fixed in commit fccfa646ef36 (\\\"efi/capsule-loader:\\nfix incorrect allocation size\\\") which fixed the same issue at the initial\\nallocation site.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/firmware/efi/capsule-loader.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"22022cd8851703a58f67615a17bc7e9e8682785b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"67adde6bfdfd563a54b045d59aeb9a2d90c80697\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"608e1f7bc9d171ab26c1fba288c97fc76363c27d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"8be69e9245f805566bac68ffc8574b64735fd996\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"5e185330d902b12fe8e6eb4b8514b5d736d8d66d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"e0e6b14995fd6fa2c0df8c712d76ab32f0694c31\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"ab3f7098a3a27175b91cfc947950f5c26855801b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f24c4d478013d82bd1b943df566fff3561d52864\",\"lessThan\":\"48a428215782321b56956974f23593e40ce84b7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"95a362c9a6892085f714eb6e31eea6a0e3aa93bf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.14.13\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/firmware/efi/capsule-loader.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-53047

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/capsule-loader.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "22022cd8851703a58f67615a17bc7e9e8682785b",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "67adde6bfdfd563a54b045d59aeb9a2d90c80697",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "608e1f7bc9d171ab26c1fba288c97fc76363c27d",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "8be69e9245f805566bac68ffc8574b64735fd996",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "5e185330d902b12fe8e6eb4b8514b5d736d8d66d",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "e0e6b14995fd6fa2c0df8c712d76ab32f0694c31",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "ab3f7098a3a27175b91cfc947950f5c26855801b",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "lessThan": "48a428215782321b56956974f23593e40ce84b7a",
              "status": "affected",
              "version": "f24c4d478013d82bd1b943df566fff3561d52864",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "95a362c9a6892085f714eb6e31eea6a0e3aa93bf",
              "versionType": "git"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.13",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/capsule-loader.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi/capsule-loader: fix incorrect sizeof in phys array reallocation\n\nThe krealloc() call for cap_info-\u003ephys in __efi_capsule_setup_info() uses\nsizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be\ncausing an undersized allocation.\n\nThe allocation is also inconsistent with the initial array allocation in\nefi_capsule_open() that allocates one entry with sizeof(phys_addr_t),\nand the efi_capsule_write() function that stores phys_addr_t values (not\npointers) via page_to_phys().\n\nOn 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this\ngoes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but\npointers are 32-bit, this allocates half the required space, which might\nlead to a heap buffer overflow when storing physical addresses.\n\nThis is similar to the bug fixed in commit fccfa646ef36 (\"efi/capsule-loader:\nfix incorrect allocation size\") which fixed the same issue at the initial\nallocation site."
    }
  ],
  "id": "CVE-2026-53047",
  "lastModified": "2026-06-24T17:17:16.533",
  "metrics": {},
  "published": "2026-06-24T17:17:16.533",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-JP44-VJ5F-4FR8

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

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->phys 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 ("efi/capsule-loader: fix incorrect allocation size") which fixed the same issue at the initial allocation site.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-53047"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi/capsule-loader: fix incorrect sizeof in phys array reallocation\n\nThe krealloc() call for cap_info-\u003ephys in __efi_capsule_setup_info() uses\nsizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be\ncausing an undersized allocation.\n\nThe allocation is also inconsistent with the initial array allocation in\nefi_capsule_open() that allocates one entry with sizeof(phys_addr_t),\nand the efi_capsule_write() function that stores phys_addr_t values (not\npointers) via page_to_phys().\n\nOn 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this\ngoes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but\npointers are 32-bit, this allocates half the required space, which might\nlead to a heap buffer overflow when storing physical addresses.\n\nThis is similar to the bug fixed in commit fccfa646ef36 (\"efi/capsule-loader:\nfix incorrect allocation size\") which fixed the same issue at the initial\nallocation site.",
  "id": "GHSA-jp44-vj5f-4fr8",
  "modified": "2026-06-24T18:32:45Z",
  "published": "2026-06-24T18:32:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53047"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

MSRC_CVE-2026-53047

Vulnerability from csaf_microsoft - Published: 2026-06-02 00:00 - Updated: 2026-06-27 01:14

Summary

efi/capsule-loader: fix incorrect sizeof in phys array reallocation

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-53047

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—	None Available

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-53047 efi/capsule-loader: fix incorrect sizeof in phys array reallocation - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53047.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "efi/capsule-loader: fix incorrect sizeof in phys array reallocation",
    "tracking": {
      "current_release_date": "2026-06-27T01:14:18.000Z",
      "generator": {
        "date": "2026-06-28T07:10:57.318Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-53047",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-27T01:14:18.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                "product": {
                  "name": "azl3 kernel 0:6.6.139.1-1.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "kernel"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 kernel 0:6.6.139.1-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-53047",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-53047 efi/capsule-loader: fix incorrect sizeof in phys array reallocation - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53047.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-06-27T01:14:18.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "title": "efi/capsule-loader: fix incorrect sizeof in phys array reallocation"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-53047 (GCVE-0-2026-53047)

FKIE_CVE-2026-53047

GHSA-JP44-VJ5F-4FR8

MSRC_CVE-2026-53047

Tags

Sightings

Nomenclature