{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b06d47be7c83165d3b3e45e1d5f9520b79c7f5cc"
            },
            {
              "fixed": "70fddc065ac80845ffd33095b3635d59883cf7e6"
            },
            {
              "fixed": "ba678c2b02e0d36b53deb5a6d5e5ea044d36def7"
            },
            {
              "fixed": "bddaa5e4094c134452c29e20a26c4718827e4cb1"
            },
            {
              "fixed": "24a22fb3c731474b68e986af6804db450fb88617"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98510.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vm: nuke PTs only after unlinking contested VMAs\n\nIn xe_vm_close_and_put(), external-BO VMAs are queued on the contested\nlist for deferred destruction via xe_vma_destroy_unlocked(). However,\nxe_vm_pt_destroy() was previously invoked before processing contested\nVMAs, destroying vm-\u003ept_root while those VMAs were still linked to their\nrespective buffer objects (vm_bo-\u003elist.gpuva).\n\nIf a concurrent thread evicts one of those shared buffer objects,\nxe_bo_trigger_rebind() holding only bo-\u003eresv walks the BO's VMAs and, in\nfault mode, calls xe_vm_invalidate_vma() -\u003e xe_pt_zap_ptes(). Because\nvm-\u003ept_root[tile-\u003eid] is already NULL, dereferencing pt-\u003elevel causes a\nNULL ptr deref.\n\nFix this by deferring xe_vm_free_scratch() and xe_vm_pt_destroy() until\nafter all contested VMAs have been unlinked and destroyed.\n\nUser is reporting hitting a NULL ptr deref in xe_pt_zap_ptes(), which\ncould be explained by this race.\n\n(cherry picked from commit c2863648959489767f08892fd6e90577d2ea0b6a)",
  "id": "CVE-2026-98510",
  "modified": "2026-10-20T02:30:39.400930160Z",
  "published": "2026-10-18T15:17:20.805Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24a22fb3c731474b68e986af6804db450fb88617"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70fddc065ac80845ffd33095b3635d59883cf7e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba678c2b02e0d36b53deb5a6d5e5ea044d36def7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bddaa5e4094c134452c29e20a26c4718827e4cb1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98510.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98510"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/xe/vm: nuke PTs only after unlinking contested VMAs"
}