Vulnerability-Lookup

GHSA-CJ8M-MVGQ-XGPV

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

accel/amdxdna: Fix potential amdxdna_umap lifetime race

amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free.

Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped.

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-2026-72328"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:05Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix potential amdxdna_umap lifetime race\n\namdxdna_umap_release() calls the blocking mmu_interval_notifier_remove()\nbefore removing the object from abo-\u003emem.umap_list. If\naie2_populate_range() runs concurrently, it may obtain a reference to an\namdxdna_umap that is being released, leading to a potential use-after-free.\n\nUse kref_get_unless_zero() in aie2_populate_range() when acquiring a\nreference. If the reference count has already dropped to zero, release\nis in progress and the entry is skipped.",
  "id": "GHSA-cj8m-mvgq-xgpv",
  "modified": "2026-08-17T06:33:23Z",
  "published": "2026-08-15T06:32:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72328"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb"
    }
  ],
  "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-2026-72328 (GCVE-0-2026-72328)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42

Title

accel/amdxdna: Fix potential amdxdna_umap lifetime race

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix potential amdxdna_umap lifetime race amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free. Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped.

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/267809e2c56fbea48…
https://git.kernel.org/stable/c/91e8109ecffb925b6…
https://git.kernel.org/stable/c/14f172eff9c19f804…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e486147c912f653ef4b60a6c7dbd4168a4c56a9f , < 267809e2c56fbea486f7250c8a4acddcc3c54dc5 (git) Affected: e486147c912f653ef4b60a6c7dbd4168a4c56a9f , < 91e8109ecffb925b6202d2737384df285b195bfb (git) Affected: e486147c912f653ef4b60a6c7dbd4168a4c56a9f , < 14f172eff9c19f8043a9858845f33cd034f3a41e (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.40 , ≤ 6.18.* (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/aie2_ctx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "267809e2c56fbea486f7250c8a4acddcc3c54dc5",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            },
            {
              "lessThan": "91e8109ecffb925b6202d2737384df285b195bfb",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            },
            {
              "lessThan": "14f172eff9c19f8043a9858845f33cd034f3a41e",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/aie2_ctx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "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": "6.18.40",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix potential amdxdna_umap lifetime race\n\namdxdna_umap_release() calls the blocking mmu_interval_notifier_remove()\nbefore removing the object from abo-\u003emem.umap_list. If\naie2_populate_range() runs concurrently, it may obtain a reference to an\namdxdna_umap that is being released, leading to a potential use-after-free.\n\nUse kref_get_unless_zero() in aie2_populate_range() when acquiring a\nreference. If the reference count has already dropped to zero, release\nis in progress and the entry is skipped."
        }
      ],
      "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 DRM ioctls (AMDXDNA_EXEC_CMD) and mmap/munmap on the AMD XDNA NPU accel node (/dev/accel/accel* or renderD*); there is no network, adjacent-radio, or physical-bus path to aie2_populate_range().\nAC:L - This is a lifetime race between munmap-driven amdxdna_umap_release() and command-submit-driven aie2_populate_range(); the attacker controls both sides with concurrent threads (unmap/invalidate vs EXEC_CMD), so no timing or state outside attacker control is required.\nPR:L - Vulnerable ioctls (CREATE_BO, EXEC_CMD, mmap) are registered with DRM_IOCTL_DEF_DRV flags 0 (no DRM_ROOT_ONLY/DRM_AUTH); any unprivileged local user permitted to open the AMD NPU accel device on Ryzen AI systems can trigger the race.\nUI:N - The attacker opens the device, maps buffer objects, and races munmap/invalidation against their own EXEC_CMD submissions; no separate victim user action or interaction is required.\nS:U - The use-after-free corrupts kernel heap objects within the same kernel security authority; it is not a VM escape, hypervisor breakout, or IOMMU DMA-boundary bypass as a direct consequence of the flaw.\nC:H - Use-after-free of kmalloc amdxdna_umap lets attacker-controlled heap spray reclaim freed notifier/range metadata; subsequent hmm_range_fault() and mm_struct dereferences enable arbitrary kernel memory disclosure.\nI:H - UAF on amdxdna_umap gives attacker control over hmm_range and PFN tables used before NPU job submission, enabling heap grooming for arbitrary kernel writes and control-flow hijack toward local privilege escalation.\nA:H - The race dereferences and mutates freed amdxdna_umap and associated mm_struct/hmm_range state, reliably causing kernel oops/panic; repeated concurrent unmap/submit cycles sustain denial of service on the NPU host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:50.096Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5"
        },
        {
          "url": "https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb"
        },
        {
          "url": "https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e"
        }
      ],
      "title": "accel/amdxdna: Fix potential amdxdna_umap lifetime race",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72328",
    "datePublished": "2026-08-15T05:55:39.296Z",
    "dateReserved": "2026-08-09T03:40:39.919Z",
    "dateUpdated": "2026-08-17T05:42:50.096Z",
    "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.

Action not permitted

GHSA-CJ8M-MVGQ-XGPV

CVE-2026-72328 (GCVE-0-2026-72328)

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Sightings

Nomenclature