CVE-2026-64167
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
kho: skip KHO for crash kernel
kho_fill_kimage() unconditionally populates the kimage with KHO metadata for every kexec image type. When the image is a crash kernel, this can be problematic as the crash kernel can run in a small reserved region and the KHO scratch areas can sit outside it. The crash kernel then faults during kho_memory_init() when it tries phys_to_virt() on the KHO FDT address:
kho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH images, but kho_fill_kimage() was missing the same guard.
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As kho_fill_kimage() is the single point that populates image->kho.fdt and image->kho.scratch, fixing it here is sufficient for both arm64 and x86 as the FDT and boot_params path are bailing out when these fields are unset.
Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel paging request at virtual address xxxxxxxx
...
fdt_offset_ptr+...
fdt_check_node_offset_+...
fdt_first_property_offset+...
fdt_get_property_namelen_+...
fdt_getprop+...
kho_memory_init+...
mm_core_init+...
start_kernel+...CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.14%
- Percentil entre todas las CVEs puntuadas: 3
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
JSON original (NVD)
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"description": [
{
"lang": "en",
"value": "CWE-476"
}
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}
],
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkho: skip KHO for crash kernel\n\nkho_fill_kimage() unconditionally populates the kimage with KHO\nmetadata for every kexec image type. When the image is a crash kernel,\nthis can be problematic as the crash kernel can run in a small reserved\nregion and the KHO scratch areas can sit outside it.\nThe crash kernel then faults during kho_memory_init() when it\ntries phys_to_virt() on the KHO FDT address:\n\n Unable to handle kernel paging request at virtual address xxxxxxxx\n ...\n fdt_offset_ptr+...\n fdt_check_node_offset_+...\n fdt_first_property_offset+...\n fdt_get_property_namelen_+...\n fdt_getprop+...\n kho_memory_init+...\n mm_core_init+...\n start_kernel+...\n\nkho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH\nimages, but kho_fill_kimage() was missing the same guard. As\nkho_fill_kimage() is the single point that populates image->kho.fdt\nand image->kho.scratch, fixing it here is sufficient for both arm64\nand x86 as the FDT and boot_params path are bailing out when these\nfields are unset."
}
],
"lastModified": "2026-08-13T15:31:37.510",
"configurations": [
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