CVE-2023-53713

{
  "id": "CVE-2023-53713",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-10-22T14:15:45.930",
  "lastModified": "2026-10-28T19:10:00.193",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: sme: Use STR P to clear FFR context field in streaming SVE mode\n\nThe FFR is a predicate register which can vary between 16 and 256 bits\nin size depending upon the configured vector length. When saving the\nSVE state in streaming SVE mode, the FFR register is inaccessible and\nso commit 9f5848665788 (\"arm64/sve: Make access to FFR optional\") simply\nclears the FFR field of the in-memory context structure. Unfortunately,\nit achieves this using an unconditional 8-byte store and so if the SME\nvector length is anything other than 64 bytes in size we will either\nfail to clear the entire field or, worse, we will corrupt memory\nimmediately following the structure. This has led to intermittent kfence\nsplats in CI [1] and can trigger kmalloc Redzone corruption messages\nwhen running the 'fp-stress' kselftest:\n\n | =============================================================================\n | BUG kmalloc-1k (Not tainted): kmalloc Redzone overwritten\n | -----------------------------------------------------------------------------\n |\n | 0xffff000809bf1e22-0xffff000809bf1e27 @offset=7714. First byte 0x0 instead of 0xcc\n | Allocated in do_sme_acc+0x9c/0x220 age=2613 cpu=1 pid=531\n |  __kmalloc+0x8c/0xcc\n |  do_sme_acc+0x9c/0x220\n |  ...\n\nReplace the 8-byte store with a store of a predicate register which has\nbeen zero-initialised with PFALSE, ensuring that the entire field is\ncleared in memory.\n\n[1] https://lore.kernel.org/r/CA+G9fYtU7HsV0R0dp4XEH5xXHSJFw8KyDf5VQrLLfMxWfxQkag@mail.gmail.com"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\narm64: sme: Usar STR P para borrar el campo de contexto FFR en modo SVE de streaming\n\nEl FFR es un registro de predicado que puede variar entre 16 y 256 bits de tamaño dependiendo de la longitud de vector configurada. Al guardar el estado SVE en modo SVE de streaming, el registro FFR es inaccesible y por lo tanto el commit 9f5848665788 (’arm64/sve: Hacer opcional el acceso a FFR’) simplemente borra el campo FFR de la estructura de contexto en memoria. Desafortunadamente, lo logra usando un almacenamiento incondicional de 8 bytes y así, si la longitud del vector SME es diferente de 64 bytes de tamaño, o no lograremos borrar el campo completo o, peor aún, corromperemos la memoria inmediatamente después de la estructura. Esto ha provocado ’kfence splats’ intermitentes en CI [1] y puede activar mensajes de corrupción de ’Redzone’ de ’kmalloc’ al ejecutar el ’kselftest’ ’fp-stress’:\n\n | =============================================================================\n | BUG kmalloc-1k (No contaminado): Redzone de kmalloc sobrescrita\n | -----------------------------------------------------------------------------\n |\n | 0xffff000809bf1e22-0xffff000809bf1e27 @offset=7714. Primer byte 0x0 en lugar de 0xcc\n | Asignado en do_sme_acc+0x9c/0x220 edad=2613 cpu=1 pid=531\n |  __kmalloc+0x8c/0xcc\n |  do_sme_acc+0x9c/0x220\n |  ...\n\nReemplazar el almacenamiento de 8 bytes con un almacenamiento de un registro de predicado que ha sido inicializado a cero con PFALSE, asegurando que todo el campo se borre en memoria.\n\n[1] https://lore.kernel.org/r/CA+G9fYtU7HsV0R0dp4XEH5xXHSJFw8KyDf5VQrLLfMxWfxQkag@mail.gmail.com"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "arch/arm64/include/asm/fpsimdmacros.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "9f5848665788a0f07bc175cb2cdd06d367b7556e",
              "lessThan": "97669214944e80d3756657c21c4f286f3da6a423",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "9f5848665788a0f07bc175cb2cdd06d367b7556e",
              "lessThan": "8769a62faacbbb6cac5e35d9047ce445183d4e9f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "9f5848665788a0f07bc175cb2cdd06d367b7556e",
              "lessThan": "1403a899153a12d93fd510e463fd6d0eafba4336",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "9f5848665788a0f07bc175cb2cdd06d367b7556e",
              "lessThan": "893b24181b4c4bf1fa2841b1ed192e5413a97cb1",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "arch/arm64/include/asm/fpsimdmacros.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.39",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.3.13",
              "lessThanOrEqual": "6.3.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.4.4",
              "lessThanOrEqual": "6.4.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.5",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-15T21:36:42.451488Z",
          "id": "CVE-2023-53713",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1403a899153a12d93fd510e463fd6d0eafba4336",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8769a62faacbbb6cac5e35d9047ce445183d4e9f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/893b24181b4c4bf1fa2841b1ed192e5413a97cb1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/97669214944e80d3756657c21c4f286f3da6a423",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}