{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 \"or1k\" 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]",
  "id": "DEBIAN-CVE-2026-89489",
  "modified": "2026-09-15T08:47:48.459161347Z",
  "published": "2026-09-11T20:19:30.683Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89489"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-89489"
  ]
}