{"api_version":"1","generated_at":"2026-07-06T05:28:21+00:00","cve":"CVE-2026-53047","urls":{"html":"https://cve.report/CVE-2026-53047","api":"https://cve.report/api/cve/CVE-2026-53047.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53047","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53047"},"summary":{"title":"efi/capsule-loader: fix incorrect sizeof in phys array reallocation","description":"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->phys 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:16","updated_at":"2026-06-24 17:17:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697","name":"https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b","name":"https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996","name":"https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b","name":"https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a","name":"https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d","name":"https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d","name":"https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31","name":"https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53047","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53047","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f24c4d478013d82bd1b943df566fff3561d52864 22022cd8851703a58f67615a17bc7e9e8682785b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f24c4d478013d82bd1b943df566fff3561d52864 67adde6bfdfd563a54b045d59aeb9a2d90c80697 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f24c4d478013d82bd1b943df566fff3561d52864 608e1f7bc9d171ab26c1fba288c97fc76363c27d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f24c4d478013d82bd1b943df566fff3561d52864 8be69e9245f805566bac68ffc8574b64735fd996 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53047","cve":"CVE-2026-53047","epss":"0.001950000","percentile":"0.093570000","score_date":"2026-06-29","updated_at":"2026-06-30 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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->phys 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"},"nvd":{"publishedDate":"2026-06-24 17:17:16","lastModifiedDate":"2026-06-24 17:17:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53047","Ordinal":"1","Title":"efi/capsule-loader: fix incorrect sizeof in phys array reallocat","CVE":"CVE-2026-53047","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53047","Ordinal":"1","NoteData":"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->phys 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.","Type":"Description","Title":"efi/capsule-loader: fix incorrect sizeof in phys array reallocat"}]}}}