{
  "cveId": "CVE-2026-89489",
  "url": "https://patchblox.com/security/cve/CVE-2026-89489",
  "summary": "CVE-2026-89489 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-89489, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  openrisc: fix arbitrary kernel memory access via...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  openrisc: fix arbitrary kernel memory access via or1k_atomic syscall  sys_or1k_atomic() (syscall 244 in the \u0022or1k\u0022 ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly.      l.lwz   r29,0(r4)     l.lwz   r27,0(r5)     l.sw    0(r4),r27     l.sw    0(r5),r29  The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries.  A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly.  This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context.  Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT.  [shorne@gmail.com: fix comment style]",
  "published": "2026-09-11T20:19:30Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00136,
  "epssPercentile": 0.03069,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.190-1",
      "fix": "DEBIAN-CVE-2026-89489",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89489",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-89489",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89489",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89489",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89489",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-89489",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89489",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}