{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-23253",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23253",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-18T17:01:44.126Z",
    "updatedAt": "2026-10-19T18:35:40.421Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "media: dvb-core: fix wrong reinitialization of ringbuffer on reopen",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen\n\ndvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the\nDVR device.  dvb_ringbuffer_init() calls init_waitqueue_head(), which\nreinitializes the waitqueue list head to empty.\n\nSince dmxdev->dvr_buffer.queue is a shared waitqueue (all opens of the\nsame DVR device share it), this orphans any existing waitqueue entries\nfrom io_uring poll or epoll, leaving them with stale prev/next pointers\nwhile the list head is reset to {self, self}.\n\nThe waitqueue and spinlock in dvr_buffer are already properly\ninitialized once in dvb_dmxdev_init().  The open path only needs to\nreset the buffer data pointer, size, and read/write positions.\n\nReplace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct\nassignment of data/size and a call to dvb_ringbuffer_reset(), which\nproperly resets pread, pwrite, and error with correct memory ordering\nwithout touching the waitqueue or spinlock.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "527cfa8a3486b3555c5c15e2f62be484a11398dc"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fb378cf89be434ed1f10ab79cc4788fba8ae868d"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f1e520ca2e83ece6731af6167c9e5e16931ecba0"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "af050ab44fa1b1897a940d7d756e512232f5e5df"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d71781bad59b1c9d60d7068004581f9bf19c0c9d"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cfd94642025e6f71c8f754bdec0800ee95e4f3dd"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "32eb8e4adc207ef31bc6e5ae56bab940b0176066"
            },
            {
              "version": "34731df288a5ffe4b0c396caf8cd24c6a710a222",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bfbc0b5b32a8f28ce284add619bf226716a59bc0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.17"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.130",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.77",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.17",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}