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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
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
References
Impacted 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)
Create a notification for this product.
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)
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a"
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    "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",
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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\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.