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CVE-2023-54278

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

s390/vmem: split pages when debug pagealloc is enabled

Since commit bb1520d581a3 ("s390/mm: start kernel with DAT enabled") the kernel crashes early during boot when debug pagealloc is enabled:

This is caused by using large mappings on machines with EDAT1/EDAT2. Add the code to split the mappings into 4k pages if debug pagealloc is enabled by CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT or the debug_pagealloc kernel command line option.

Detalles técnicos trazas, registros y código del informe original
mem auto-init: stack:off, heap alloc:off, heap free:off
addressing exception: 0005 ilc:2 [#1] SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0-rc3-09759-gc5666c912155 #630
[..]
Krnl Code: 00000000001325f6: ec5600248064 cgrj %r5,%r6,8,000000000013263e
           00000000001325fc: eb880002000c srlg %r8,%r8,2
          #0000000000132602: b2210051     ipte %r5,%r1,%r0,0
          >0000000000132606: b90400d1     lgr %r13,%r1
           000000000013260a: 41605008     la %r6,8(%r5)
           000000000013260e: a7db1000     aghi %r13,4096
           0000000000132612: b221006d     ipte %r6,%r13,%r0,0
           0000000000132616: e3d0d0000171 lay %r13,4096(%r13)

Call Trace:
 __kernel_map_pages+0x14e/0x320
 __free_pages_ok+0x23a/0x5a8)
 free_low_memory_core_early+0x214/0x2c8
 memblock_free_all+0x28/0x58
 mem_init+0xb6/0x228
 mm_core_init+0xb6/0x3b0
 start_kernel+0x1d2/0x5a8
 startup_continue+0x36/0x40
Kernel panic - not syncing: Fatal exception: panic_on_oops

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-54278",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "bb1520d581a3a46e2d6e12bb74604ace33404de5",
              "lessThan": "601e467e29a960f7ab7ec4075afc6a68c3532a65",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bb1520d581a3a46e2d6e12bb74604ace33404de5",
              "lessThan": "edc1e4b6e26536868ef819a735e04a5b32c10589",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/s390/mm/vmem.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.4.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/s390/mm/vmem.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-30T13:16:16.757",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/601e467e29a960f7ab7ec4075afc6a68c3532a65",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/edc1e4b6e26536868ef819a735e04a5b32c10589",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vmem: split pages when debug pagealloc is enabled\n\nSince commit bb1520d581a3 (\"s390/mm: start kernel with DAT enabled\")\nthe kernel crashes early during boot when debug pagealloc is enabled:\n\nmem auto-init: stack:off, heap alloc:off, heap free:off\naddressing exception: 0005 ilc:2 [#1] SMP DEBUG_PAGEALLOC\nModules linked in:\nCPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0-rc3-09759-gc5666c912155 #630\n[..]\nKrnl Code: 00000000001325f6: ec5600248064 cgrj %r5,%r6,8,000000000013263e\n           00000000001325fc: eb880002000c srlg %r8,%r8,2\n          #0000000000132602: b2210051     ipte %r5,%r1,%r0,0\n          >0000000000132606: b90400d1     lgr %r13,%r1\n           000000000013260a: 41605008     la %r6,8(%r5)\n           000000000013260e: a7db1000     aghi %r13,4096\n           0000000000132612: b221006d     ipte %r6,%r13,%r0,0\n           0000000000132616: e3d0d0000171 lay %r13,4096(%r13)\n\nCall Trace:\n __kernel_map_pages+0x14e/0x320\n __free_pages_ok+0x23a/0x5a8)\n free_low_memory_core_early+0x214/0x2c8\n memblock_free_all+0x28/0x58\n mem_init+0xb6/0x228\n mm_core_init+0xb6/0x3b0\n start_kernel+0x1d2/0x5a8\n startup_continue+0x36/0x40\nKernel panic - not syncing: Fatal exception: panic_on_oops\n\nThis is caused by using large mappings on machines with EDAT1/EDAT2. Add\nthe code to split the mappings into 4k pages if debug pagealloc is enabled\nby CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT or the debug_pagealloc kernel\ncommand line option."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ns390/vmem: dividir páginas cuando debug pagealloc está habilitado\n\nDesde el commit bb1520d581a3 ('s390/mm: iniciar kernel con DAT habilitado'), el kernel falla temprano durante el arranque cuando debug pagealloc está habilitado:\n\ninicialización automática de memoria: pila:desactivado, asignación de heap:desactivado, liberación de heap:desactivado\nexcepción de direccionamiento: 0005 ilc:2 [#1] SMP DEBUG_PAGEALLOC\nMódulos enlazados:\nCPU: 0 PID: 0 Comm: swapper No contaminado 6.5.0-rc3-09759-gc5666c912155 #630\n[..]\nCódigo del kernel: 00000000001325f6: ec5600248064 cgrj %r5,%r6,8,000000000013263e\n           00000000001325fc: eb880002000c srlg %r8,%r8,2\n          #0000000000132602: b2210051     ipte %r5,%r1,%r0,0\n          >0000000000132606: b90400d1     lgr %r13,%r1\n           000000000013260a: 41605008     la %r6,8(%r5)\n           000000000013260e: a7db1000     aghi %r13,4096\n           0000000000132612: b221006d     ipte %r6,%r13,%r0,0\n           0000000000132616: e3d0d0000171 lay %r13,4096(%r13)\n\nTraza de llamadas:\n __kernel_map_pages+0x14e/0x320\n __free_pages_ok+0x23a/0x5a8)\n free_low_memory_core_early+0x214/0x2c8\n memblock_free_all+0x28/0x58\n mem_init+0xb6/0x228\n mm_core_init+0xb6/0x3b0\n start_kernel+0x1d2/0x5a8\n startup_continue+0x36/0x40\nPánico del kernel - no sincronizando: Excepción fatal: panic_on_oops\n\nEsto es causado por el uso de mapeos grandes en máquinas con EDAT1/EDAT2. Añadir el código para dividir los mapeos en páginas de 4k si debug pagealloc está habilitado por CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT o la opción de línea de comandos del kernel debug_pagealloc."
    }
  ],
  "lastModified": "2026-06-17T06:47:08.720",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}