{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9"
            },
            {
              "fixed": "be5c39730ab8f1dfe59983bf7d8e3705541d1fee"
            },
            {
              "fixed": "157b1e3384d7d37f59c0c2b2ff2af8f557db1daa"
            },
            {
              "fixed": "90e4fd331b980259c40118d05b89b0ec514e7c48"
            },
            {
              "fixed": "6384271ac1ac0099198d15df79212a19ebdb929d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68264.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/pt: Reset current_op in xe_pt_update_ops_init()\n\nxe_pt_update_ops_init() fails to reset current_op to 0. On the\nvm_bind path, ops_execute() calls xe_pt_update_ops_prepare() inside\nthe xe_validation_guard() / drm_exec_until_all_locked() loop. When\nthat loop retries due to lock contention or OOM eviction\n(drm_exec_retry_on_contention() / xe_validation_retry_on_oom()),\nxe_pt_update_ops_prepare() runs again on the same vops, and each\ncall to bind_op_prepare() increments current_op without resetting it.\n\nAfter N retries current_op exceeds the array size allocated by\nxe_vma_ops_alloc(), causing an out-of-bounds write into\nSLUB-poisoned memory and a subsequent UAF crash in\nxe_migrate_update_pgtables_cpu() when reading the corrupted pt_op-\u003ebind.\n\nAlso reset needs_svm_lock and needs_invalidation which are derived in\nthe same prepare pass and would otherwise cause wrong migrate ops\nselection and redundant TLB invalidation on retry.\n\nFix this by resetting current_op, needs_svm_lock and needs_invalidation\nin xe_pt_update_ops_init().\n\nv2 (Matt):\n   - Add details in commit message.\n   - Add Fixes tag and Cc to stable@vger.kernel.org\n\n(cherry picked from commit 046045543e530605c441063535e7dca0075369a6)",
  "id": "CVE-2026-68264",
  "modified": "2026-08-12T03:51:36.447614348Z",
  "published": "2026-08-10T12:01:38.686Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/157b1e3384d7d37f59c0c2b2ff2af8f557db1daa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6384271ac1ac0099198d15df79212a19ebdb929d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90e4fd331b980259c40118d05b89b0ec514e7c48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be5c39730ab8f1dfe59983bf7d8e3705541d1fee"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68264.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68264"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/xe/pt: Reset current_op in xe_pt_update_ops_init()"
}