Vulnerability-Lookup

GHSA-W7RF-7RXM-HR7V

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-14 00:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()

Commit 9e9787414882 ("drm/xe/userptr: replace xe_hmm with gpusvm") made xe_svm_init() unconditional in xe_vm_create() and extended it to also initialize a "simple" gpusvm state for non-fault-mode VMs. The matching xe_svm_fini() call in xe_vm_close_and_put() was updated to run unconditionally, but the error unwind path in xe_vm_create() was not.

On the drm_gpuvm_resv_object_alloc() failure path, xe_svm_init() has already succeeded but xe_svm_fini() is only called when XE_VM_FLAG_FAULT_MODE is set. For non-fault-mode VMs this leaves vm->svm.gpusvm partially initialized and leaks the resources allocated by drm_gpusvm_init().

For fault-mode VMs, xe_svm_init() additionally acquires the pagemap owner via drm_pagemap_acquire_owner() and the pagemaps via xe_svm_get_pagemaps(). Those resources are released by xe_svm_close(), not xe_svm_fini(). On the same error path, xe_svm_close() is not called either, so fault-mode VMs leak the pagemap owner and pagemaps.

Fix both leaks:

Call xe_svm_fini() unconditionally on the err_svm_fini path, matching the unconditional xe_svm_init() call. Move the vm->size = 0 assignment out of the conditional so the xe_vm_is_closed() assert in xe_svm_fini() (and xe_svm_close()) holds for both modes.
Call xe_svm_close() for fault-mode VMs before xe_svm_fini(), matching the ordering used in xe_vm_close_and_put().

(cherry picked from commit ca2a3587d577ba764e0fe628fb676244fc33ddd4)

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68298"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:19Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()\n\nCommit 9e9787414882 (\"drm/xe/userptr: replace xe_hmm with gpusvm\") made\nxe_svm_init() unconditional in xe_vm_create() and extended it to also\ninitialize a \"simple\" gpusvm state for non-fault-mode VMs. The matching\nxe_svm_fini() call in xe_vm_close_and_put() was updated to run\nunconditionally, but the error unwind path in xe_vm_create() was not.\n\nOn the drm_gpuvm_resv_object_alloc() failure path, xe_svm_init() has\nalready succeeded but xe_svm_fini() is only called when\nXE_VM_FLAG_FAULT_MODE is set. For non-fault-mode VMs this leaves\nvm-\u003esvm.gpusvm partially initialized and leaks the resources allocated\nby drm_gpusvm_init().\n\nFor fault-mode VMs, xe_svm_init() additionally acquires the pagemap\nowner via drm_pagemap_acquire_owner() and the pagemaps via\nxe_svm_get_pagemaps(). Those resources are released by xe_svm_close(),\nnot xe_svm_fini(). On the same error path, xe_svm_close() is not\ncalled either, so fault-mode VMs leak the pagemap owner and pagemaps.\n\nFix both leaks:\n\n- Call xe_svm_fini() unconditionally on the err_svm_fini path, matching\n  the unconditional xe_svm_init() call. Move the vm-\u003esize = 0\n  assignment out of the conditional so the xe_vm_is_closed() assert in\n  xe_svm_fini() (and xe_svm_close()) holds for both modes.\n\n- Call xe_svm_close() for fault-mode VMs before xe_svm_fini(), matching\n  the ordering used in xe_vm_close_and_put().\n\n(cherry picked from commit ca2a3587d577ba764e0fe628fb676244fc33ddd4)",
  "id": "GHSA-w7rf-7rxm-hr7v",
  "modified": "2026-08-14T00:31:55Z",
  "published": "2026-08-10T15:33:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68298"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/279339aa8bdcf9db40094cf2bcbd495c53dbe817"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ac92736030f3395d970c300eaeb59ac258a0c3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2c6800ad1802bed72a6de1416536737f114f1d6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-68298 (GCVE-0-2026-68298)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-08-17 05:02

Title

drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create() Commit 9e9787414882 ("drm/xe/userptr: replace xe_hmm with gpusvm") made xe_svm_init() unconditional in xe_vm_create() and extended it to also initialize a "simple" gpusvm state for non-fault-mode VMs. The matching xe_svm_fini() call in xe_vm_close_and_put() was updated to run unconditionally, but the error unwind path in xe_vm_create() was not. On the drm_gpuvm_resv_object_alloc() failure path, xe_svm_init() has already succeeded but xe_svm_fini() is only called when XE_VM_FLAG_FAULT_MODE is set. For non-fault-mode VMs this leaves vm->svm.gpusvm partially initialized and leaks the resources allocated by drm_gpusvm_init(). For fault-mode VMs, xe_svm_init() additionally acquires the pagemap owner via drm_pagemap_acquire_owner() and the pagemaps via xe_svm_get_pagemaps(). Those resources are released by xe_svm_close(), not xe_svm_fini(). On the same error path, xe_svm_close() is not called either, so fault-mode VMs leak the pagemap owner and pagemaps. Fix both leaks: - Call xe_svm_fini() unconditionally on the err_svm_fini path, matching the unconditional xe_svm_init() call. Move the vm->size = 0 assignment out of the conditional so the xe_vm_is_closed() assert in xe_svm_fini() (and xe_svm_close()) holds for both modes. - Call xe_svm_close() for fault-mode VMs before xe_svm_fini(), matching the ordering used in xe_vm_close_and_put(). (cherry picked from commit ca2a3587d577ba764e0fe628fb676244fc33ddd4)

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

3 references

URL	Tags
https://git.kernel.org/stable/c/279339aa8bdcf9db4…
https://git.kernel.org/stable/c/9ac92736030f3395d…
https://git.kernel.org/stable/c/d2c6800ad1802bed7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9e978741488261e117bb50e5dfcf8e4080990958 , < 279339aa8bdcf9db40094cf2bcbd495c53dbe817 (git) Affected: 9e978741488261e117bb50e5dfcf8e4080990958 , < 9ac92736030f3395d970c300eaeb59ac258a0c3e (git) Affected: 9e978741488261e117bb50e5dfcf8e4080990958 , < d2c6800ad1802bed72a6de1416536737f114f1d6 (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_vm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "279339aa8bdcf9db40094cf2bcbd495c53dbe817",
              "status": "affected",
              "version": "9e978741488261e117bb50e5dfcf8e4080990958",
              "versionType": "git"
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            {
              "lessThan": "9ac92736030f3395d970c300eaeb59ac258a0c3e",
              "status": "affected",
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            {
              "lessThan": "d2c6800ad1802bed72a6de1416536737f114f1d6",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_vm.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "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": "6.18.42",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()\n\nCommit 9e9787414882 (\"drm/xe/userptr: replace xe_hmm with gpusvm\") made\nxe_svm_init() unconditional in xe_vm_create() and extended it to also\ninitialize a \"simple\" gpusvm state for non-fault-mode VMs. The matching\nxe_svm_fini() call in xe_vm_close_and_put() was updated to run\nunconditionally, but the error unwind path in xe_vm_create() was not.\n\nOn the drm_gpuvm_resv_object_alloc() failure path, xe_svm_init() has\nalready succeeded but xe_svm_fini() is only called when\nXE_VM_FLAG_FAULT_MODE is set. For non-fault-mode VMs this leaves\nvm-\u003esvm.gpusvm partially initialized and leaks the resources allocated\nby drm_gpusvm_init().\n\nFor fault-mode VMs, xe_svm_init() additionally acquires the pagemap\nowner via drm_pagemap_acquire_owner() and the pagemaps via\nxe_svm_get_pagemaps(). Those resources are released by xe_svm_close(),\nnot xe_svm_fini(). On the same error path, xe_svm_close() is not\ncalled either, so fault-mode VMs leak the pagemap owner and pagemaps.\n\nFix both leaks:\n\n- Call xe_svm_fini() unconditionally on the err_svm_fini path, matching\n  the unconditional xe_svm_init() call. Move the vm-\u003esize = 0\n  assignment out of the conditional so the xe_vm_is_closed() assert in\n  xe_svm_fini() (and xe_svm_close()) holds for both modes.\n\n- Call xe_svm_close() for fault-mode VMs before xe_svm_fini(), matching\n  the ordering used in xe_vm_close_and_put().\n\n(cherry picked from commit ca2a3587d577ba764e0fe628fb676244fc33ddd4)"
        }
      ],
      "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 - Reached through the DRM_IOCTL_XE_VM_CREATE ioctl on /dev/dri/renderD*, which requires local access to the render node; there is no remote or network path into xe_vm_create().\nAC:L - The attacker induces the required drm_gpuvm_resv_object_alloc() ENOMEM by generating memory pressure while looping VM creates, and controls the second half of the bug directly by issuing another fault-mode VM create to walk the corrupted global peer list.\nPR:L - Any user with access to the render node (render/video group, typical for desktop, container, and Android GPU clients) can issue the ioctl; xe_vm_create_ioctl() performs no capability check.\nUI:N - The attacking process triggers the faulty error path entirely on its own via repeated ioctls; no action by another user is needed.\nS:U - The corruption stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed xe_vm stays linked in the global xe_owner_list, so later drm_pagemap_acquire_owner() walks read cur_peer-\u003eowner and dereference container_of() pointers out of a reclaimable slab object, giving an attacker who sprays that object a kernel read primitive.\nI:H - The dangling list node lets list_add_tail() write through attacker-reclaimed next/prev pointers in the freed xe_vm, a classic linked-list write primitive that can be escalated to control-flow hijack and privilege escalation.\nA:H - Traversing the global owner list through a freed xe_vm reliably oopses or panics the kernel, and the leaked pagemap owner and xe_pagemap references permanently pin device memory resources."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:02:34.595Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/279339aa8bdcf9db40094cf2bcbd495c53dbe817"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ac92736030f3395d970c300eaeb59ac258a0c3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2c6800ad1802bed72a6de1416536737f114f1d6"
        }
      ],
      "title": "drm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68298",
    "datePublished": "2026-08-10T12:02:32.194Z",
    "dateReserved": "2026-07-30T09:28:09.380Z",
    "dateUpdated": "2026-08-17T05:02:34.595Z",
    "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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GHSA-W7RF-7RXM-HR7V

CVE-2026-68298 (GCVE-0-2026-68298)

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Nomenclature