CVE-2022-49686

Estado: AnalizadaAlta (7.8)—

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

usb: gadget: uvc: fix list double add in uvcg_video_pump

A panic can occur if the endpoint becomes disabled and the uvcg_video_pump adds the request back to the req_free list after it has already been queued to the endpoint. The endpoint complete will add the request back to the req_free list. Invalidate the local request handle once it's been queued.

<6>[ 246.796704][T13726] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0) <3>[ 246.797078][ T26] list_add double add: new=ffffff878bee5c40, prev=ffffff878bee5c40, next=ffffff878b0f0a90. <6>[ 246.797213][ T26] ------------[ cut here ]------------ <2>[ 246.797224][ T26] kernel BUG at lib/list_debug.c:31! <6>[ 246.807073][ T26] Call trace: <6>[ 246.807180][ T26] uvcg_video_pump+0x364/0x38c <6>[ 246.807366][ T26] process_one_work+0x2a4/0x544 <6>[ 246.807394][ T26] worker_thread+0x350/0x784 <6>[ 246.807442][ T26] kthread+0x2ac/0x320

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: 0.25%
Percentil entre todas las CVEs puntuadas: 15
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 escalation75 %
Impacto principalT1499.004 Application or System Exploitationimpact65 %

Acceso local sin interacción (AV:L/PR:L/UI:N) que causa pánico del kernel por doble adición a lista; permite DoS del subsistema USB/gadget.

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)

Linux — Linux Kernel

CWE

CWE-415

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-49686",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "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
      }
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  "affected": [
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      "affectedData": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "status": "affected",
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              "lessThan": "d95ac8b920de1d39525fadc408ce675697626ca6",
              "versionType": "git"
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              "versionType": "git"
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          ],
          "programFiles": [
            "drivers/usb/gadget/function/uvc_video.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.18.8",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/usb/gadget/function/uvc_video.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-26T07:01:43.437",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/96163f835e65f8c9897487fac965819f0651d671",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d95ac8b920de1d39525fadc408ce675697626ca6",
      "tags": [
        "Patch"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: uvc: fix list double add in uvcg_video_pump\n\nA panic can occur if the endpoint becomes disabled and the\nuvcg_video_pump adds the request back to the req_free list after it has\nalready been queued to the endpoint. The endpoint complete will add the\nrequest back to the req_free list. Invalidate the local request handle\nonce it's been queued.\n\n<6>[  246.796704][T13726] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0)\n<3>[  246.797078][   T26] list_add double add: new=ffffff878bee5c40, prev=ffffff878bee5c40, next=ffffff878b0f0a90.\n<6>[  246.797213][   T26] ------------[ cut here ]------------\n<2>[  246.797224][   T26] kernel BUG at lib/list_debug.c:31!\n<6>[  246.807073][   T26] Call trace:\n<6>[  246.807180][   T26]  uvcg_video_pump+0x364/0x38c\n<6>[  246.807366][   T26]  process_one_work+0x2a4/0x544\n<6>[  246.807394][   T26]  worker_thread+0x350/0x784\n<6>[  246.807442][   T26]  kthread+0x2ac/0x320"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: gadget: uvc: fix list double add in uvcg_video_pump Puede producirse un pánico si el endpoint se deshabilita y uvcg_video_pump agrega la solicitud nuevamente a la lista req_free después de que ya se haya puesto en cola en el endpoint. La finalización del endpoint agregará la solicitud nuevamente a la lista req_free. Invalida el identificador de solicitud local una vez que se haya puesto en cola.  &lt;6&gt;[ 246.796704][T13726] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0) &lt;3&gt;[ 246.797078][ T26] list_add double add: new=ffffff878bee5c40, prev=ffffff878bee5c40, next=ffffff878b0f0a90. &lt;6&gt;[ 246.797213][ T26] ------------[ cut here ]------------ &lt;2&gt;[ 246.797224][ T26] kernel BUG at lib/list_debug.c:31! &lt;6&gt;[ 246.807073][ T26] Call trace: &lt;6&gt;[ 246.807180][ T26] uvcg_video_pump+0x364/0x38c &lt;6&gt;[ 246.807366][ T26] process_one_work+0x2a4/0x544 &lt;6&gt;[ 246.807394][ T26] worker_thread+0x350/0x784 &lt;6&gt;[ 246.807442][ T26] kthread+0x2ac/0x320 "
    }
  ],
  "lastModified": "2026-06-17T05:18:51.900",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0172D3FA-DDEB-482A-A270-4A1495A8798C",
              "versionEndExcluding": "5.18.8",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*",
              "vulnerable": true,
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              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60"
            }
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}