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

{
  "id": "3006e4e563f1f6d1277ac4333b53b04929e85920d63a2d1f2a9f2a7bcce4c276",
  "url": "https://osv.dev/vulnerability/CVE-2022-50725",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: vidtv: Fix use-after-free in vidtv_bridge_dvb_init() 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] ... 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.",
    "evidence": "osv:CVE-2022-50725",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.86",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50725",
      "aliases": [
        "CVE-2022-50725"
      ],
      "affected": [
        {
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              "type": "GIT",
              "events": [
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                {
                  "fixed": "0369af6fe33d4053899b121b32e91f870b2cf0ae"
                },
                {
                  "fixed": "c290aa527fd832d278c6388a3ba53a9890fbd74a"
                },
                {
                  "fixed": "06398ce69571a43a8a0dd0f1bfe35d221f726a6a"
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                {
                  "fixed": "8a204a0b4a0d105229735222c515759ea2b126c1"
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                  "fixed": "ba8d9405935097e296bcf7a942c3a01df0edb865"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50725.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.10.0"
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            {
              "type": "ECOSYSTEM",
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              "events": [
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                  "introduced": "5.16.0"
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                {
                  "fixed": "6.0.16"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
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                {
                  "fixed": "6.1.2"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50725.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.182120332Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0369af6fe33d4053899b121b32e91f870b2cf0ae",
        "https://git.kernel.org/stable/c/06398ce69571a43a8a0dd0f1bfe35d221f726a6a",
        "https://git.kernel.org/stable/c/8a204a0b4a0d105229735222c515759ea2b126c1",
        "https://git.kernel.org/stable/c/ba8d9405935097e296bcf7a942c3a01df0edb865",
        "https://git.kernel.org/stable/c/c290aa527fd832d278c6388a3ba53a9890fbd74a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50725.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50725",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50725.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50725",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 522270,
  "published_at": "2025-12-24T12:22:46.939+00:00"
}