{
  "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-2026-89489",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89489",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:43:42.164Z",
    "updatedAt": "2026-10-19T08:47:40.968Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "openrisc: fix arbitrary kernel memory access via or1k_atomic syscall",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenrisc: fix arbitrary kernel memory access via or1k_atomic syscall\n\nsys_or1k_atomic() (syscall 244 in the \"or1k\" ABI) takes two user\npointers, v1 and v2, and swaps the words they point to in hand-written\nassembly.\n\n    l.lwz   r29,0(r4)\n    l.lwz   r27,0(r5)\n    l.sw    0(r4),r27\n    l.sw    0(r5),r29\n\nThe pointers are not checked with access_ok(). The four memory\naccesses also have no exception table entries.\n\nA caller passes a kernel address as either pointer, and the syscall\nreads from and writes to it directly.\n\nThis gives an unprivileged process a kernel read/write primitive. It\noverwrites kernel data such as the sys_call_table, gaining code\nexecution in kernel context.\n\nCheck both pointers before entering the critical section. Add fixups\nfor the four memory accesses so faults on valid but unmapped user\naddresses return -EFAULT.\n\n[shorne@gmail.com: fix comment style]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bf310718c6fa6adeee06d207a55489546d860e2c"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "497cba0b02e5555d99fe9ee1dc478af743ab7f7a"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1f2e92e499d863f81df1732af59b4a3559969193"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "574ae2ac2b314aa33498cd2c28add106cbe644f2"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a520e8cac54fb403f3800125b606f55fcad42cb9"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d64a75369cd0f2ee79afcc9d9ca34a3890989379"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b53435c079c78f89f70a62dd5a322cca4e292b34"
            },
            {
              "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "78004e9a87f240df03e2f73120d291763c32e0a7"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.1"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}