CVE-2023-53800

Estado: AplazadaAlta (7.8)—

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

ubi: Fix use-after-free when volume resizing failed

When ubi_change_vtbl_record() returns an error in ubi_resize_volume(), "new_eba_tbl" will be freed on error handing path, but it is holded by "vol->eba_tbl" in ubi_eba_replace_table(). It means that the liftcycle of "vol->eba_tbl" and "vol" are different, so when resizing volume in next time, it causing an use-after-free fault.

Fix it by not freeing "new_eba_tbl" after it replaced in ubi_eba_replace_table(), while will be freed in next volume resizing.

Detalles técnicos trazas, registros y código del informe original

There is an use-after-free problem reported by KASAN:
  ==================================================================
  BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi]
  Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735

  CPU: 2 PID: 4735 Comm: ubirsvol
  Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
  BIOS 1.14.0-1.fc33 04/01/2014
  Call Trace:
   <TASK>
   dump_stack_lvl+0x34/0x44
   print_report+0x171/0x472
   kasan_report+0xad/0x130
   ubi_eba_copy_table+0x11f/0x1c0 [ubi]
   ubi_resize_volume+0x4f9/0xbc0 [ubi]
   ubi_cdev_ioctl+0x701/0x1850 [ubi]
   __x64_sys_ioctl+0x11d/0x170
   do_syscall_64+0x35/0x80
   entry_SYSCALL_64_after_hwframe+0x46/0xb0
   </TASK>

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1499.004 Application or System Exploitationimpact70 %

Vulnerabilidad de use-after-free en ubi_resize_volume() requiere acceso local con privilegios (PR:L, AV:L) sin interacción del usuario. El fallo causa DoS por crash de kernel (corrupción de memoria leída por KASAN).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

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

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-53800",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "lessThan": "bf9875aa7f7d624a8c084425b14bf7e5907ebc30",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "lessThan": "9c8be1f165baee53b5a36ea0b3c9281d403a1d0b",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "35f8d4064e54c18424db2997059d4c0b1d13d093",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "lessThan": "53818746e549e61841428892a8d94344494be797",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "lessThan": "b0c951742348d216f094d16ed4f70ae73db881c0",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
            },
            {
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            }
          ],
          "programFiles": [
            "drivers/mtd/ubi/vmt.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.22"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.22",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.14.308",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "status": "unaffected",
              "version": "4.19.276",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.235",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.173",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.100",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.18",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/mtd/ubi/vmt.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-09T01:16:51.727",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix use-after-free when volume resizing failed\n\nThere is an use-after-free problem reported by KASAN:\n  ==================================================================\n  BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi]\n  Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735\n\n  CPU: 2 PID: 4735 Comm: ubirsvol\n  Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\n  BIOS 1.14.0-1.fc33 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x34/0x44\n   print_report+0x171/0x472\n   kasan_report+0xad/0x130\n   ubi_eba_copy_table+0x11f/0x1c0 [ubi]\n   ubi_resize_volume+0x4f9/0xbc0 [ubi]\n   ubi_cdev_ioctl+0x701/0x1850 [ubi]\n   __x64_sys_ioctl+0x11d/0x170\n   do_syscall_64+0x35/0x80\n   entry_SYSCALL_64_after_hwframe+0x46/0xb0\n   </TASK>\n\nWhen ubi_change_vtbl_record() returns an error in ubi_resize_volume(),\n\"new_eba_tbl\" will be freed on error handing path, but it is holded\nby \"vol->eba_tbl\" in ubi_eba_replace_table(). It means that the liftcycle\nof \"vol->eba_tbl\" and \"vol\" are different, so when resizing volume in\nnext time, it causing an use-after-free fault.\n\nFix it by not freeing \"new_eba_tbl\" after it replaced in\nubi_eba_replace_table(), while will be freed in next volume resizing."
    }
  ],
  "lastModified": "2026-08-04T10:19:21.800",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}