CVE-2023-54012

Estado: AplazadaAlta (7.8)—

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

net: fix stack overflow when LRO is disabled for virtual interfaces

When the virtual interface's feature is updated, it synchronizes the updated feature for its own lower interface. This propagation logic should be worked as the iteration, not recursively. But it works recursively due to the netdev notification unexpectedly. This problem occurs when it disables LRO only for the team and bonding interface type.

If team0's LRO feature is updated, it generates the NETDEV_FEAT_CHANGE event to its own lower interfaces(team1 ~ team200). It is worked by netdev_sync_lower_features().

Leer descripción completaMostrar menos

So, the NETDEV_FEAT_CHANGE notification logic of each lower interface work iteratively. But generated NETDEV_FEAT_CHANGE event is also sent to the upper interface too. upper interface(team0) generates the NETDEV_FEAT_CHANGE event for its own lower interfaces again. lower and upper interfaces receive this event and generate this event again and again. So, the stack overflow occurs.

But it is not the infinite loop issue. Because the netdev_sync_lower_features() updates features before generating the NETDEV_FEAT_CHANGE event. Already synchronized lower interfaces skip notification logic. So, it is just the problem that iteration logic is changed to the recursive unexpectedly due to the notification mechanism.

Reproducer:

ip link add team0 type team ethtool -K team0 lro on for i in {1..200} do ip link add team$i master team0 type team ethtool -K team$i lro on done

ethtool -K team0 lro off

In order to fix it, the notifier_ctx member of bonding/team is introduced.

Detalles técnicos trazas, registros y código del informe original

       team0
         |
  +------+------+-----+-----+
  |      |      |     |     |
team1  team2  team3  ...  team200

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: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

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 Exploitationimpact80 %

Vulnerabilidad de escalada local (AV:L, PR:L) sin interacción del usuario que provoca desbordamiento de pila en el kernel Linux al deshabilitar LRO, permitiendo DoS. Requiere acceso local con privilegios limitados.

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-2023-54012",
  "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": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "9ea0c5f90a27b5b884d880e146e0f65f3052e401",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "4bb955c4d2830a58c08e2a48ab75d75368e3ff36",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "cf3b5cd7127cc10c5b12400c545f263f0e5e715c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "ed66e6327a69fec95034cda2ac5b6a57b8b3b622",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "6bf00bb3dc7e5b9fb05488e11616e65d64e975fa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fd867d51f889aec11cca235ebb008578780d052d",
              "lessThan": "ae9b15fbe63447bc1d3bba3769f409d17ca6fdf6",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/bonding/bond_main.c",
            "drivers/net/team/team.c",
            "include/linux/if_team.h",
            "include/net/bonding.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.244",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.114",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.31",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/bonding/bond_main.c",
            "drivers/net/team/team.c",
            "include/linux/if_team.h",
            "include/net/bonding.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T11:15:54.170",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4bb955c4d2830a58c08e2a48ab75d75368e3ff36",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6bf00bb3dc7e5b9fb05488e11616e65d64e975fa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9ea0c5f90a27b5b884d880e146e0f65f3052e401",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae9b15fbe63447bc1d3bba3769f409d17ca6fdf6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cf3b5cd7127cc10c5b12400c545f263f0e5e715c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ed66e6327a69fec95034cda2ac5b6a57b8b3b622",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix stack overflow when LRO is disabled for virtual interfaces\n\nWhen the virtual interface's feature is updated, it synchronizes the\nupdated feature for its own lower interface.\nThis propagation logic should be worked as the iteration, not recursively.\nBut it works recursively due to the netdev notification unexpectedly.\nThis problem occurs when it disables LRO only for the team and bonding\ninterface type.\n\n       team0\n         |\n  +------+------+-----+-----+\n  |      |      |     |     |\nteam1  team2  team3  ...  team200\n\nIf team0's LRO feature is updated, it generates the NETDEV_FEAT_CHANGE\nevent to its own lower interfaces(team1 ~ team200).\nIt is worked by netdev_sync_lower_features().\nSo, the NETDEV_FEAT_CHANGE notification logic of each lower interface\nwork iteratively.\nBut generated NETDEV_FEAT_CHANGE event is also sent to the upper\ninterface too.\nupper interface(team0) generates the NETDEV_FEAT_CHANGE event for its own\nlower interfaces again.\nlower and upper interfaces receive this event and generate this\nevent again and again.\nSo, the stack overflow occurs.\n\nBut it is not the infinite loop issue.\nBecause the netdev_sync_lower_features() updates features before\ngenerating the NETDEV_FEAT_CHANGE event.\nAlready synchronized lower interfaces skip notification logic.\nSo, it is just the problem that iteration logic is changed to the\nrecursive unexpectedly due to the notification mechanism.\n\nReproducer:\n\nip link add team0 type team\nethtool -K team0 lro on\nfor i in {1..200}\ndo\n        ip link add team$i master team0 type team\n        ethtool -K team$i lro on\ndone\n\nethtool -K team0 lro off\n\nIn order to fix it, the notifier_ctx member of bonding/team is introduced."
    }
  ],
  "lastModified": "2026-08-04T10:19:25.493",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}