{
  "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-2023-54255",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54255",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-30T12:15:50.822Z",
    "updatedAt": "2026-05-11T19:58:27.430Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "sh: dma: Fix DMA channel offset calculation",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsh: dma: Fix DMA channel offset calculation\n\nVarious SoCs of the SH3, SH4 and SH4A family, which use this driver,\nfeature a differing number of DMA channels, which can be distributed\nbetween up to two DMAC modules. The existing implementation fails to\ncorrectly accommodate for all those variations, resulting in wrong\nchannel offset calculations and leading to kernel panics.\n\nRewrite dma_base_addr() in order to properly calculate channel offsets\nin a DMAC module. Fix dmaor_read_reg() and dmaor_write_reg(), so that\nthe correct DMAC module base is selected for the DMAOR register.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bca700b48c72f4ffeee977a2ed0eb4a6b4b7b8ad"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "479380acfa63247b5ac62476138f847aefc62692"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4989627157735c1f1619f08e5bc1592418e7c878"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d1c946552af299f4fa85bf7da15e328123771128"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "196f6c71905aa384c0177acf194a1144d480333b"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8fb11fa4805699c6b73a9c8a9d45807f9874abe3"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e9e33faea104381bac80ac79328f0540fc2969f2"
            },
            {
              "version": "7f47c7189b3e8f19a589f77a3ad169d7b691b582",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e82e47584847129a20b8c9f4a1dcde09374fb0e0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "version": "4.14.322",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.291",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.251",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.4.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "version": "6.5",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}