{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0ee4ddc1647b8b3b9e7a94d798a1774a764428c1"
            },
            {
              "fixed": "ae452b990e0544425f77045351c56e77158858e7"
            },
            {
              "fixed": "da07a751efa4583385f9f0f47113549fe8871242"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89919.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: keyop: use mmu_lock to read gmap-\u003easce\n\nEvery other dat_* consumer in this file (kvm_s390_get_skeys,\nset_skeys, get_cmma_bits, set_cmma_bits, MEM_CLR_CMMA,\nkvm_s390_fixup_prefix, kvm_test_age_gfn, kvm_age_gfn) reads\nkvm-\u003earch.gmap-\u003easce *inside* the mmu_lock read-side. keyop is the only\noutlier.\n\ngmap-\u003easce is mutated under write_lock(mmu_lock) by gmap_set_limit()\nand keyop might use a stale asce value for walking as KVM_S390_KEYOP\nand KVM_S390_VM_MEM_LIMIT_SIZE can run concurrently. This can result\nin memory corruption.",
  "id": "CVE-2026-89919",
  "modified": "2026-09-18T03:30:15.565391028Z",
  "published": "2026-09-16T10:32:14.013Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae452b990e0544425f77045351c56e77158858e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da07a751efa4583385f9f0f47113549fe8871242"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89919.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89919"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "KVM: s390: keyop: use mmu_lock to read gmap-\u003easce"
}