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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
f24c4d478013d82bd1b943df566fff3561d52864 affected < 22022cd8851703a58f67615a17bc7e9e8682785b
f24c4d478013d82bd1b943df566fff3561d52864 affected < 67adde6bfdfd563a54b045d59aeb9a2d90c80697
f24c4d478013d82bd1b943df566fff3561d52864 affected < 608e1f7bc9d171ab26c1fba288c97fc76363c27d
f24c4d478013d82bd1b943df566fff3561d52864 affected < 8be69e9245f805566bac68ffc8574b64735fd996
f24c4d478013d82bd1b943df566fff3561d52864 affected < 5e185330d902b12fe8e6eb4b8514b5d736d8d66d
f24c4d478013d82bd1b943df566fff3561d52864 affected < e0e6b14995fd6fa2c0df8c712d76ab32f0694c31
f24c4d478013d82bd1b943df566fff3561d52864 affected < ab3f7098a3a27175b91cfc947950f5c26855801b
f24c4d478013d82bd1b943df566fff3561d52864 affected < 48a428215782321b56956974f23593e40ce84b7a
95a362c9a6892085f714eb6e31eea6a0e3aa93bf affected —
4.14.13 affected < 4.15
Linux Linux affected
Version Status Constraints
4.15 affected —
0 unaffected < 4.15
5.10.258 unaffected ≤ 5.10.*
5.15.209 unaffected ≤ 5.15.*
6.1.175 unaffected ≤ 6.1.*
6.6.141 unaffected ≤ 6.6.*
6.12.91 unaffected ≤ 6.12.*
6.18.33 unaffected ≤ 6.18.*
7.0.10 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b cve-icon
https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a cve-icon
https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d cve-icon
https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d cve-icon
https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697 cve-icon
https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996 cve-icon
https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b cve-icon
https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31 cve-icon
History

Wed, 24 Jun 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
CWE-125

Wed, 24 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
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.
Title efi/capsule-loader: fix incorrect sizeof in phys array reallocation
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-24T16:29:53.491Z

Reserved: 2026-06-09T07:44:35.381Z

Link: CVE-2026-53047

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

Updated: 2026-06-24T21:00:11Z

Weaknesses