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CVE-2022-50725

Estado: AplazadaSin puntuar—

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

media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()

It is because the error handling in vidtv_bridge_dvb_init() is wrong.

First, vidtv_bridge_dmx(dev)_init() will clean themselves when fail, but goto fail_dmx(_dev): calls release functions again, which causes use-after-free.

Also, in fail_fe, fail_tuner_probe and fail_demod_probe, j = i will cause out-of-bound when i finished its loop (i == NUM_FE). And the loop releasing is wrong, although now NUM_FE is 1 so it won't cause problem.

Fix this by correctly releasing everything.

Detalles técnicos trazas, registros y código del informe original
KASAN reports a use-after-free:
BUG: KASAN: use-after-free in dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]
Call Trace:
 ...
 dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]
 vidtv_bridge_probe+0x7bf/0xa40 [dvb_vidtv_bridge]
 platform_probe+0xb6/0x170
 ...
Allocated by task 1238:
 ...
 dvb_register_device+0x1a7/0xa70 [dvb_core]
 dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]
 vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]
 ...
Freed by task 1238:
 dvb_register_device+0x6d2/0xa70 [dvb_core]
 dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]
 vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]
 ...

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-2022-50725",
  "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": "f90cf6079bf67988f8b1ad1ade70fc89d0080905",
              "lessThan": "0369af6fe33d4053899b121b32e91f870b2cf0ae",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f90cf6079bf67988f8b1ad1ade70fc89d0080905",
              "lessThan": "c290aa527fd832d278c6388a3ba53a9890fbd74a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f90cf6079bf67988f8b1ad1ade70fc89d0080905",
              "lessThan": "06398ce69571a43a8a0dd0f1bfe35d221f726a6a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f90cf6079bf67988f8b1ad1ade70fc89d0080905",
              "lessThan": "8a204a0b4a0d105229735222c515759ea2b126c1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f90cf6079bf67988f8b1ad1ade70fc89d0080905",
              "lessThan": "ba8d9405935097e296bcf7a942c3a01df0edb865",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/test-drivers/vidtv/vidtv_bridge.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/test-drivers/vidtv/vidtv_bridge.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:15:59.157",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0369af6fe33d4053899b121b32e91f870b2cf0ae",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/06398ce69571a43a8a0dd0f1bfe35d221f726a6a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a204a0b4a0d105229735222c515759ea2b126c1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ba8d9405935097e296bcf7a942c3a01df0edb865",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c290aa527fd832d278c6388a3ba53a9890fbd74a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()\n\nKASAN reports a use-after-free:\nBUG: KASAN: use-after-free in dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]\nCall Trace:\n ...\n dvb_dmxdev_release+0x4d5/0x5d0 [dvb_core]\n vidtv_bridge_probe+0x7bf/0xa40 [dvb_vidtv_bridge]\n platform_probe+0xb6/0x170\n ...\nAllocated by task 1238:\n ...\n dvb_register_device+0x1a7/0xa70 [dvb_core]\n dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]\n vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]\n ...\nFreed by task 1238:\n dvb_register_device+0x6d2/0xa70 [dvb_core]\n dvb_dmxdev_init+0x2af/0x4a0 [dvb_core]\n vidtv_bridge_probe+0x766/0xa40 [dvb_vidtv_bridge]\n ...\n\nIt is because the error handling in vidtv_bridge_dvb_init() is wrong.\n\nFirst, vidtv_bridge_dmx(dev)_init() will clean themselves when fail, but\ngoto fail_dmx(_dev): calls release functions again, which causes\nuse-after-free.\n\nAlso, in fail_fe, fail_tuner_probe and fail_demod_probe, j = i will cause\nout-of-bound when i finished its loop (i == NUM_FE). And the loop\nreleasing is wrong, although now NUM_FE is 1 so it won't cause problem.\n\nFix this by correctly releasing everything."
    }
  ],
  "lastModified": "2026-06-17T05:24:04.310",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}