{
  "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-2021-47483",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47483",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-22T08:19:34.852Z",
    "updatedAt": "2026-08-05T08:48:00.568Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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": "regmap: Fix possible double-free in regcache_rbtree_exit()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: Fix possible double-free in regcache_rbtree_exit()\n\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\n\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\n slab_free_freelist_hook+0x10d/0x240\n kfree+0xce/0x390\n regcache_rbtree_exit+0x15d/0x1a0\n regcache_rbtree_init+0x224/0x2c0\n regcache_init+0x88d/0x1310\n __regmap_init+0x3151/0x4a80\n __devm_regmap_init+0x7d/0x100\n madera_spi_probe+0x10f/0x333 [madera_spi]\n spi_probe+0x183/0x210\n really_probe+0x285/0xc30\n\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e72dce9afbdbfa70d9b44f5908a50ff6c4858999"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fc081477b47dfc3a6cb50a96087fc29674013fc2"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "758ced2c3878ff789801e6fee808e185c5cf08d6"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3dae1a4eced3ee733d7222e69b8a55caf2d61091"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1cead23c1c0bc766dacb900a3b0269f651ad596f"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "36e911a16b377bde0ad91a8c679069d0d310b1a6"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "50cc1462a668dc62949a1127388bc3af785ce047"
            },
            {
              "version": "3f4ff561bc88b074d5e868dde4012d89cbb06c87",
              "status": "affected",
              "versionType": "git",
              "lessThan": "55e6d8037805b3400096d621091dfbf713f97e83"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.12"
            },
            {
              "version": "4.4.291",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.289",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.254",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.215",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.77",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}