{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_pt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2b6b3f98d0e93856bee38699b783c71cb0e9d67f",
              "status": "affected",
              "version": "ad9843aac91a1eda12912a4922042ea04cfc29dc",
              "versionType": "git"
            },
            {
              "lessThan": "8a0fb57675be578c4db19deb4298ed08a70f0f1a",
              "status": "affected",
              "version": "ad9843aac91a1eda12912a4922042ea04cfc29dc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_pt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "lessThan": "7.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/pt: prevent invalid cursor access for purged BOs\n\nDuring a page table walk for binding, xe_pt_stage_bind() explicitly\nskips initializing the xe_res_cursor for purged BOs, treating them\nsimilarly to NULL VMAs by only setting the cursor size.\n\nHowever, xe_pt_hugepte_possible() and xe_pt_scan_64K() did not check\nif the BO was purged before attempting to walk the cursor using\nxe_res_dma() and xe_res_next(). Because the cursor was left\nuninitialized for purged BOs, this falls through and triggers\nwarnings like:\n\n  WARNING: drivers/gpu/drm/xe/xe_res_cursor.h:274 at xe_res_next\n\nFix this by explicitly checking if the BO is purged in both\nxe_pt_hugepte_possible() and xe_pt_scan_64K(), returning early just\nas we do for NULL VMAs, avoiding the invalid cursor accesses entirely.\n\nAs a precaution, also zero-initialize the cursor in xe_pt_stage_bind()\nto ensure we don\u0027t pass garbage data into the page table walkers\nif we ever hit a similar edge case in the future.\n\n(cherry picked from commit 4c7b9c6ece32440e5a435a92076d049450cd2d2e)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local ioctl access to the Intel Xe DRM render node (/dev/dri/renderD*) via XE_VM_BIND and XE_MADVISE to drive purged-buffer page-table rebinds through xe_pt_stage_bind(); this path is not reachable over the network or without local GPU device access.\nAC:L - An attacker controls the full trigger sequence\u2014marking BOs DONTNEED via madvise, inducing memory pressure to purge backing store, and forcing rebind\u2014so the uninitialized-cursor walk is reliably reachable without races or conditions outside attacker influence.\nPR:L - Only standard unprivileged local access to the DRM render node is required (typical render/video group membership on desktops, cloud GPU instances, and shared workstations); no real root/CAP_SYS_ADMIN and user namespaces do not grant additional reach.\nUI:N - No victim or administrator interaction is needed; the attacker drives the entire sequence through their own DRM ioctls and deliberate memory-pressure to purge and rebind their own mapped buffer objects.\nS:U - Impact is kernel memory corruption and denial-of-service within the same OS security boundary (potential local privilege escalation), not a VM escape, IOMMU/DMA boundary bypass, or cross-tenant isolation break.\nC:H - xe_pt_hugepte_possible() and xe_pt_scan_64K() read uninitialized xe_res_cursor stack fields via xe_res_dma()/xe_res_next() on purged BOs, constituting kernel memory corruption that can leak adjacent stack/heap data or skew page-table decisions.\nI:H - Garbage cursor mem_type/node pointers drive buddy-allocator list traversal during page-table walks, enabling kernel heap metadata corruption and potential arbitrary write or control-flow hijack primitives beyond the intended safe NULL/scratch PTE rebind path.\nA:H - Invalid cursor traversal triggers XE_WARN_ON in xe_res_next and can dereference corrupt buddy-list pointers during purged-BO rebind, causing kernel warnings, oops, or panic and denying GPU and system availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:16.546Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2b6b3f98d0e93856bee38699b783c71cb0e9d67f"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a0fb57675be578c4db19deb4298ed08a70f0f1a"
        }
      ],
      "title": "drm/xe/pt: prevent invalid cursor access for purged BOs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72358",
    "datePublished": "2026-08-15T05:55:58.783Z",
    "dateReserved": "2026-08-09T03:40:39.921Z",
    "dateUpdated": "2026-08-17T05:43:16.546Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}