Vulnerability-Lookup

GHSA-79JG-FP86-Q5XG

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

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

accel/amdxdna: Fix iommu domain lifetime race during device removal

When force_iova mode is enabled, amdxdna_remove() frees xdna->domain. If amdxdna_gem_obj_free() is called after device removal, it may attempt to access xdna->domain, resulting in a use-after-free.

Fix the race by adding freeing xdna->domain as a managed release action, so its lifetime is managed by DRM and remains valid until all managed resources are released.

Severity

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80608"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:44Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix iommu domain lifetime race during device removal\n\nWhen force_iova mode is enabled, amdxdna_remove() frees xdna-\u003edomain. If\namdxdna_gem_obj_free() is called after device removal, it may attempt to\naccess xdna-\u003edomain, resulting in a use-after-free.\n\nFix the race by adding freeing xdna-\u003edomain as a managed release action,\nso its lifetime is managed by DRM and remains valid until all managed\nresources are released.",
  "id": "GHSA-79jg-fp86-q5xg",
  "modified": "2026-08-29T09:30:25Z",
  "published": "2026-08-28T09:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80608"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65e7e2b8d71b418439ebc68e80ed3e5a325375d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4a0500fdf6e61a6c5f92ff2e61bc91578075803"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80608 (GCVE-0-2026-80608)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21

Title

accel/amdxdna: Fix iommu domain lifetime race during device removal

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix iommu domain lifetime race during device removal When force_iova mode is enabled, amdxdna_remove() frees xdna->domain. If amdxdna_gem_obj_free() is called after device removal, it may attempt to access xdna->domain, resulting in a use-after-free. Fix the race by adding freeing xdna->domain as a managed release action, so its lifetime is managed by DRM and remains valid until all managed resources are released.

Severity

8.8 (High)


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

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/65e7e2b8d71b41843…
https://git.kernel.org/stable/c/b4a0500fdf6e61a6c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ece3e8980907818c72dc9faa7bbaf40488ef1824 , < 65e7e2b8d71b418439ebc68e80ed3e5a325375d6 (git) Affected: ece3e8980907818c72dc9faa7bbaf40488ef1824 , < b4a0500fdf6e61a6c5f92ff2e61bc91578075803 (git)
Linux	Linux	Affected: 7.1 Unaffected: 0 , < 7.1 (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_iommu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "65e7e2b8d71b418439ebc68e80ed3e5a325375d6",
              "status": "affected",
              "version": "ece3e8980907818c72dc9faa7bbaf40488ef1824",
              "versionType": "git"
            },
            {
              "lessThan": "b4a0500fdf6e61a6c5f92ff2e61bc91578075803",
              "status": "affected",
              "version": "ece3e8980907818c72dc9faa7bbaf40488ef1824",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_iommu.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\naccel/amdxdna: Fix iommu domain lifetime race during device removal\n\nWhen force_iova mode is enabled, amdxdna_remove() frees xdna-\u003edomain. If\namdxdna_gem_obj_free() is called after device removal, it may attempt to\naccess xdna-\u003edomain, resulting in a use-after-free.\n\nFix the race by adding freeing xdna-\u003edomain as a managed release action,\nso its lifetime is managed by DRM and remains valid until all managed\nresources are released."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is reached via local /dev/accel/accel* syscalls (open, DRM_IOCTL_AMDXDNA_CREATE_BO, close) that call amdxdna_gem_obj_free()\u2192amdxdna_dma_unmap_bo(); there is no network, adjacent-radio, or physical-bus entry to this AMD XDNA NPU driver path.\nAC:L - This is a lifetime race between amdxdna_remove() freeing xdna-\u003edomain and concurrent GEM teardown; an attacker controls both sides with threads holding DMA-mapped BOs while triggering driver unbind/rmmod or rapid create/destroy ioctls, reliably hitting the post-removal amdxdna_dma_unmap_bo() UAF window.\nPR:L - Vulnerable ioctls use DRM_IOCTL_DEF_DRV flags 0 (no DRM_ROOT_ONLY/DRM_AUTH); any local user permitted to open the AMD NPU accel device on Ryzen AI systems can create IOVA-mapped BOs and race teardown, without init-namespace root, once force_iova mode is active.\nUI:N - Exploitation requires only the attacker opening the accel device, allocating buffer objects, and closing/releasing them (or duping fds) during driver removal; no separate victim mount, click, or other user interaction is needed.\nS:C - The use-after-free dereferences a freed struct iommu_domain during iommu_unmap()/IOVA teardown; corrupting IOMMU mapping state can break DMA isolation between the NPU and host physical memory, crossing the IOMMU security boundary.\nC:H - Use-after-free of the IOMMU domain object and associated iovad metadata via amdxdna_dma_unmap_bo() enables attacker-influenced slab reuse; subsequent iommu_unmap and IOVA allocator dereferences provide arbitrary kernel memory disclosure primitives.\nI:H - UAF on the IOMMU domain during unmap enables heap grooming to corrupt IOMMU page-table management structures and kernel objects, supporting arbitrary kernel writes, control-flow hijack, and potential redirection of NPU DMA to attacker-chosen pages.\nA:H - Dereferencing and operating on a freed iommu_domain in amdxdna_dma_unmap_bo() causes kernel oops/panic; the race is repeatable whenever GEM objects outlive amdxdna_iommu_fini() during device removal, sustaining denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:18.093Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/65e7e2b8d71b418439ebc68e80ed3e5a325375d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4a0500fdf6e61a6c5f92ff2e61bc91578075803"
        }
      ],
      "title": "accel/amdxdna: Fix iommu domain lifetime race during device removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80608",
    "datePublished": "2026-08-28T06:48:32.152Z",
    "dateReserved": "2026-08-26T14:34:25.773Z",
    "dateUpdated": "2026-08-29T06:21:18.093Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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-79JG-FP86-Q5XG

CVE-2026-80608 (GCVE-0-2026-80608)

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