Vulnerability-Lookup

CVE-2026-74721 (GCVE-0-2026-74721)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33

Title

accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages() Two error paths in amdxdna_insert_pages() called vma->vm_ops->close(vma) before returning an error code to the caller. This is incorrect: amdxdna_gem_obj_mmap() registers an HMM interval notifier before calling amdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo that registration. Calling vm_ops->close() manually — which drops the shmem pages_pin_count and the GEM object reference that backs the VMA — before the mmap syscall has even returned causes those resources to be released while the VMA is still alive. The kernel VMA teardown will call vm_ops->close() a second time when the process later unmaps the range, producing a reference count underflow. Replace both hard-error returns with a deferred-fault approach that keeps the VMA alive and retries page insertion through the HMM range-fault path.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/1501e4d07c6fee0d5…
https://git.kernel.org/stable/c/8d51e0fd3e698919d…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: e486147c912f653ef4b60a6c7dbd4168a4c56a9f , < 1501e4d07c6fee0d50531a0d1cb2be01a63e6e75 (git) Affected: e486147c912f653ef4b60a6c7dbd4168a4c56a9f , < 8d51e0fd3e698919d2adeff71936377f0c0d4aa0 (git)	guessed
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_gem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1501e4d07c6fee0d50531a0d1cb2be01a63e6e75",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            },
            {
              "lessThan": "8d51e0fd3e698919d2adeff71936377f0c0d4aa0",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_gem.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": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "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": "7.1.9",
                  "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/amxdna: Fix page-insertion errors in amdxdna_insert_pages()\n\nTwo error paths in amdxdna_insert_pages() called vma-\u003evm_ops-\u003eclose(vma)\nbefore returning an error code to the caller.  This is incorrect:\namdxdna_gem_obj_mmap() registers an HMM interval notifier before calling\namdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo\nthat registration.  Calling vm_ops-\u003eclose() manually \u2014 which drops the\nshmem pages_pin_count and the GEM object reference that backs the VMA \u2014\nbefore the mmap syscall has even returned causes those resources to be\nreleased while the VMA is still alive.  The kernel VMA teardown will call\nvm_ops-\u003eclose() a second time when the process later unmaps the range,\nproducing a reference count underflow.\n\nReplace both hard-error returns with a deferred-fault approach that keeps\nthe VMA alive and retries page insertion through the HMM range-fault path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:13.960Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1501e4d07c6fee0d50531a0d1cb2be01a63e6e75"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d51e0fd3e698919d2adeff71936377f0c0d4aa0"
        }
      ],
      "title": "accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74721",
    "datePublished": "2026-08-22T15:33:13.960Z",
    "dateReserved": "2026-08-15T05:44:03.929Z",
    "dateUpdated": "2026-08-22T15:33:13.960Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74721\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:47.080\",\"lastModified\":\"2026-08-22T16:16:47.080\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naccel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()\\n\\nTwo error paths in amdxdna_insert_pages() called vma-\u003evm_ops-\u003eclose(vma)\\nbefore returning an error code to the caller.  This is incorrect:\\namdxdna_gem_obj_mmap() registers an HMM interval notifier before calling\\namdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo\\nthat registration.  Calling vm_ops-\u003eclose() manually \u2014 which drops the\\nshmem pages_pin_count and the GEM object reference that backs the VMA \u2014\\nbefore the mmap syscall has even returned causes those resources to be\\nreleased while the VMA is still alive.  The kernel VMA teardown will call\\nvm_ops-\u003eclose() a second time when the process later unmaps the range,\\nproducing a reference count underflow.\\n\\nReplace both hard-error returns with a deferred-fault approach that keeps\\nthe VMA alive and retries page insertion through the HMM range-fault path.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/accel/amdxdna/amdxdna_gem.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e486147c912f653ef4b60a6c7dbd4168a4c56a9f\",\"lessThan\":\"1501e4d07c6fee0d50531a0d1cb2be01a63e6e75\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e486147c912f653ef4b60a6c7dbd4168a4c56a9f\",\"lessThan\":\"8d51e0fd3e698919d2adeff71936377f0c0d4aa0\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/accel/amdxdna/amdxdna_gem.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1501e4d07c6fee0d50531a0d1cb2be01a63e6e75\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d51e0fd3e698919d2adeff71936377f0c0d4aa0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-74721

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-22 16:16

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1501e4d07c6fee0d50531a0d1cb2be01a63e6e75
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8d51e0fd3e698919d2adeff71936377f0c0d4aa0

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_gem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1501e4d07c6fee0d50531a0d1cb2be01a63e6e75",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            },
            {
              "lessThan": "8d51e0fd3e698919d2adeff71936377f0c0d4aa0",
              "status": "affected",
              "version": "e486147c912f653ef4b60a6c7dbd4168a4c56a9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_gem.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": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "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\naccel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()\n\nTwo error paths in amdxdna_insert_pages() called vma-\u003evm_ops-\u003eclose(vma)\nbefore returning an error code to the caller.  This is incorrect:\namdxdna_gem_obj_mmap() registers an HMM interval notifier before calling\namdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo\nthat registration.  Calling vm_ops-\u003eclose() manually \u2014 which drops the\nshmem pages_pin_count and the GEM object reference that backs the VMA \u2014\nbefore the mmap syscall has even returned causes those resources to be\nreleased while the VMA is still alive.  The kernel VMA teardown will call\nvm_ops-\u003eclose() a second time when the process later unmaps the range,\nproducing a reference count underflow.\n\nReplace both hard-error returns with a deferred-fault approach that keeps\nthe VMA alive and retries page insertion through the HMM range-fault path."
    }
  ],
  "id": "CVE-2026-74721",
  "lastModified": "2026-08-22T16:16:47.080",
  "metrics": {},
  "published": "2026-08-22T16:16:47.080",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1501e4d07c6fee0d50531a0d1cb2be01a63e6e75"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d51e0fd3e698919d2adeff71936377f0c0d4aa0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-GRMX-X9WR-GMVH

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

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

accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()

Two error paths in amdxdna_insert_pages() called vma->vm_ops->close(vma) before returning an error code to the caller. This is incorrect: amdxdna_gem_obj_mmap() registers an HMM interval notifier before calling amdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo that registration. Calling vm_ops->close() manually — which drops the shmem pages_pin_count and the GEM object reference that backs the VMA — before the mmap syscall has even returned causes those resources to be released while the VMA is still alive. The kernel VMA teardown will call vm_ops->close() a second time when the process later unmaps the range, producing a reference count underflow.

Replace both hard-error returns with a deferred-fault approach that keeps the VMA alive and retries page insertion through the HMM range-fault path.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74721"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()\n\nTwo error paths in amdxdna_insert_pages() called vma-\u003evm_ops-\u003eclose(vma)\nbefore returning an error code to the caller.  This is incorrect:\namdxdna_gem_obj_mmap() registers an HMM interval notifier before calling\namdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo\nthat registration.  Calling vm_ops-\u003eclose() manually \u2014 which drops the\nshmem pages_pin_count and the GEM object reference that backs the VMA \u2014\nbefore the mmap syscall has even returned causes those resources to be\nreleased while the VMA is still alive.  The kernel VMA teardown will call\nvm_ops-\u003eclose() a second time when the process later unmaps the range,\nproducing a reference count underflow.\n\nReplace both hard-error returns with a deferred-fault approach that keeps\nthe VMA alive and retries page insertion through the HMM range-fault path.",
  "id": "GHSA-grmx-x9wr-gmvh",
  "modified": "2026-08-22T18:30:30Z",
  "published": "2026-08-22T18:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74721"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1501e4d07c6fee0d50531a0d1cb2be01a63e6e75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d51e0fd3e698919d2adeff71936377f0c0d4aa0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

CVE-2026-74721 (GCVE-0-2026-74721)

FKIE_CVE-2026-74721

GHSA-GRMX-X9WR-GMVH

Tags

Sightings

Nomenclature