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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53047 Detail

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->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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b kernel.org
https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a kernel.org
https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d kernel.org
https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d kernel.org
https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697 kernel.org
https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996 kernel.org
https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b kernel.org
https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53047
NVD Published Date:
06/24/2026
NVD Last Modified:
06/24/2026
Source:
kernel.org