Answer in brief
CVE-2026-53047 records a Unknown severity vulnerability in efi/capsule-loader: fix incorrect sizeof in phys array reallocation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f24c4d478013d82bd1b943df566fff3561d52864 <22022cd8851703a58f67615a17bc7e9e8682785b || >=f24c4d478013d82bd1b943df566fff3561d52864 <67adde6bfdfd563a54b045d59aeb9a2d90c80697 || >=f24c4d478013d82bd1b943df566fff3561d52864 <608e1f7bc9d171ab26c1fba288c97fc76363c27d || >=f24c4d478013d82bd1b943df566fff3561d52864 <8be69e9245f805566bac68ffc8574b64735fd996 || >=f24c4d478013d82bd1b943df566fff3561d52864 <5e185330d902b12fe8e6eb4b8514b5d736d8d66d || >=f24c4d478013d82bd1b943df566fff3561d52864 <e0e6b14995fd6fa2c0df8c712d76ab32f0694c31 || >=f24c4d478013d82bd1b943df566fff3561d52864 <ab3f7098a3a27175b91cfc947950f5c26855801b || >=f24c4d478013d82bd1b943df566fff3561d52864 <48a428215782321b56956974f23593e40ce84b7a || 95a362c9a6892085f714eb6e31eea6a0e3aa93bf || >=4.14.13 <4.15 | 22022cd8851703a58f67615a17bc7e9e8682785b, 67adde6bfdfd563a54b045d59aeb9a2d90c80697, 608e1f7bc9d171ab26c1fba288c97fc76363c27d, 8be69e9245f805566bac68ffc8574b64735fd996, 5e185330d902b12fe8e6eb4b8514b5d736d8d66d, e0e6b14995fd6fa2c0df8c712d76ab32f0694c31, ab3f7098a3a27175b91cfc947950f5c26855801b, 48a428215782321b56956974f23593e40ce84b7a, 4.15 |
| Linux/Linuxgeneric | 4.15 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.