Vulnerability-Lookup

FKIE_CVE-2026-68264

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 05:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/pt: Reset current_op in xe_pt_update_ops_init() xe_pt_update_ops_init() fails to reset current_op to 0. On the vm_bind path, ops_execute() calls xe_pt_update_ops_prepare() inside the xe_validation_guard() / drm_exec_until_all_locked() loop. When that loop retries due to lock contention or OOM eviction (drm_exec_retry_on_contention() / xe_validation_retry_on_oom()), xe_pt_update_ops_prepare() runs again on the same vops, and each call to bind_op_prepare() increments current_op without resetting it. After N retries current_op exceeds the array size allocated by xe_vma_ops_alloc(), causing an out-of-bounds write into SLUB-poisoned memory and a subsequent UAF crash in xe_migrate_update_pgtables_cpu() when reading the corrupted pt_op->bind. Also reset needs_svm_lock and needs_invalidation which are derived in the same prepare pass and would otherwise cause wrong migrate ops selection and redundant TLB invalidation on retry. Fix this by resetting current_op, needs_svm_lock and needs_invalidation in xe_pt_update_ops_init(). v2 (Matt): - Add details in commit message. - Add Fixes tag and Cc to stable@vger.kernel.org (cherry picked from commit 046045543e530605c441063535e7dca0075369a6)

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/157b1e3384d7d37f59c0c2b2ff2af8f557db1daa
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6384271ac1ac0099198d15df79212a19ebdb929d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/90e4fd331b980259c40118d05b89b0ec514e7c48
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be5c39730ab8f1dfe59983bf7d8e3705541d1fee

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "be5c39730ab8f1dfe59983bf7d8e3705541d1fee",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "157b1e3384d7d37f59c0c2b2ff2af8f557db1daa",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "90e4fd331b980259c40118d05b89b0ec514e7c48",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "6384271ac1ac0099198d15df79212a19ebdb929d",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "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": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-08-17T05:18:28.860",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-10T13:20:15.257",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/157b1e3384d7d37f59c0c2b2ff2af8f557db1daa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6384271ac1ac0099198d15df79212a19ebdb929d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/90e4fd331b980259c40118d05b89b0ec514e7c48"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be5c39730ab8f1dfe59983bf7d8e3705541d1fee"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-68264 (GCVE-0-2026-68264)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-17 05:01

Title

drm/xe/pt: Reset current_op in xe_pt_update_ops_init()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/be5c39730ab8f1dfe…
https://git.kernel.org/stable/c/157b1e3384d7d37f5…
https://git.kernel.org/stable/c/90e4fd331b980259c…
https://git.kernel.org/stable/c/6384271ac1ac00991…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 , < be5c39730ab8f1dfe59983bf7d8e3705541d1fee (git) Affected: e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 , < 157b1e3384d7d37f59c0c2b2ff2af8f557db1daa (git) Affected: e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 , < 90e4fd331b980259c40118d05b89b0ec514e7c48 (git) Affected: e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 , < 6384271ac1ac0099198d15df79212a19ebdb929d (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "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": "be5c39730ab8f1dfe59983bf7d8e3705541d1fee",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "157b1e3384d7d37f59c0c2b2ff2af8f557db1daa",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "90e4fd331b980259c40118d05b89b0ec514e7c48",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "versionType": "git"
            },
            {
              "lessThan": "6384271ac1ac0099198d15df79212a19ebdb929d",
              "status": "affected",
              "version": "e8babb280b5ef904df54b3a90e5a7e3a9600c4a9",
              "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": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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": "6.12.103",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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)"
        }
      ],
      "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 - The bug is reached through the DRM_IOCTL_XE_VM_BIND ioctl on an Intel Xe DRM render node (/dev/dri/renderD*), which requires local access to the device file; there is no remote or adjacent-network path.\nAC:L - The overflow needs only one retry of the xe_validation_guard()/drm_exec_until_all_locked() loop, and the attacker drives both retry sources itself: concurrent vm_bind/exec threads on the same BOs force drm_exec_retry_on_contention(), and filling VRAM forces xe_validation_retry_on_oom(). Both sides of the race are attacker-controlled and the sequence is repeatable at will.\nPR:L - Only an open file descriptor on the Xe render node plus a VM created via DRM_IOCTL_XE_VM_CREATE is needed; no capability check exists on the vm_bind path. Render nodes are routinely accessible to unprivileged users, Android apps, containers and GPU-sharing tenants.\nUI:N - The attacker performs the entire sequence (vm create, bo create, vm_bind with induced contention/memory pressure) from its own process; no victim action is required.\nS:U - The out-of-bounds write and the subsequent corrupted-pointer use occur in kernel heap memory within the same security authority as the kernel itself; no VM, IOMMU or sandbox boundary is crossed by the flaw itself.\nC:H - After the index inflates, xe_pt_update_ops_fini()/xe_pt_update_ops_abort() iterate i \u003c current_op and read adjacent-slab contents as xe_vma/pt pointers and num_entries, and xe_migrate_update_pgtables_cpu() consumes the corrupted pt_op, giving out-of-bounds reads of kernel objects and a UAF that can be groomed into an arbitrary-read primitive.\nI:H - Each retry writes a full struct xe_vm_pgtable_update_op (pointer-rich entries[] plus vma pointer and flags) past the end of the kmalloc\u0027d ops array, with attacker-chosen overflow length and slab size, and the corrupted entries are later fed to xe_pt_free_bind()/xe_pt_abort_bind() and GPU page-table programming \u2014 a controllable heap corruption suitable for privilege escalation.\nA:H - The commit documents an out-of-bounds write into SLUB-poisoned memory followed by a UAF crash in xe_migrate_update_pgtables_cpu(); an unprivileged process can reliably and repeatedly panic the kernel, and corrupted page-table state additionally wedges the GPU."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:01:56.847Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/be5c39730ab8f1dfe59983bf7d8e3705541d1fee"
        },
        {
          "url": "https://git.kernel.org/stable/c/157b1e3384d7d37f59c0c2b2ff2af8f557db1daa"
        },
        {
          "url": "https://git.kernel.org/stable/c/90e4fd331b980259c40118d05b89b0ec514e7c48"
        },
        {
          "url": "https://git.kernel.org/stable/c/6384271ac1ac0099198d15df79212a19ebdb929d"
        }
      ],
      "title": "drm/xe/pt: Reset current_op in xe_pt_update_ops_init()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68264",
    "datePublished": "2026-08-10T12:01:38.686Z",
    "dateReserved": "2026-07-30T09:28:09.378Z",
    "dateUpdated": "2026-08-17T05:01:56.847Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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FKIE_CVE-2026-68264

CVE-2026-68264 (GCVE-0-2026-68264)

Tags

Sightings

Nomenclature