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

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ece3e8980907818c72dc9faa7bbaf40488ef1824 , < 65e7e2b8d71b418439ebc68e80ed3e5a325375d6 (git)
Affected: ece3e8980907818c72dc9faa7bbaf40488ef1824 , < b4a0500fdf6e61a6c5f92ff2e61bc91578075803 (git)
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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"
          ],
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        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
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              "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."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:18.093Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/65e7e2b8d71b418439ebc68e80ed3e5a325375d6"
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          "url": "https://git.kernel.org/stable/c/b4a0500fdf6e61a6c5f92ff2e61bc91578075803"
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    "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"
  },
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    "redhat_vex": {
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      "cve": "CVE-2026-80608",
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      "product_status:known_not_affected": "274",
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      "cve": "CVE-2026-80608",
      "id": "CVE-2026-80608",
      "initial_release_date": "2026-08-28T16:36:30Z",
      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80608",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80608.json",
      "version": "5"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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