CVE-2026-53084 (GCVE-0-2026-53084)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
bpf: return VMA snapshot from task_vma iterator
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: return VMA snapshot from task_vma iterator Holding the per-VMA lock across the BPF program body creates a lock ordering problem when helpers acquire locks that depend on mmap_lock: vm_lock -> i_rwsem -> mmap_lock -> vm_lock Snapshot the VMA under the per-VMA lock in _next() via memcpy(), then drop the lock before returning. The BPF program accesses only the snapshot. The verifier only trusts vm_mm and vm_file pointers (see BTF_TYPE_SAFE_TRUSTED_OR_NULL in verifier.c). vm_file is reference- counted with get_file() under the lock and released via fput() on the next iteration or in _destroy(). vm_mm is already correct because lock_vma_under_rcu() verifies vma->vm_mm == mm. All other pointers are left as-is by memcpy() since the verifier treats them as untrusted.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4ac4546821584736798aaa9e97da9f6eaf689ea3 , < 83b8802c034e843b83a3e1ef6f30cdd4e9ec291c (git)
Affected: 4ac4546821584736798aaa9e97da9f6eaf689ea3 , < 592226d138378601ae28eb890e2bbc23ec3600f7 (git)
Affected: 4ac4546821584736798aaa9e97da9f6eaf689ea3 , < 13860ca37b8df0b856ee1ce3bdbd7c327d5f53e8 (git)
Affected: 4ac4546821584736798aaa9e97da9f6eaf689ea3 , < 4cbee026db54cad39c39db4d356100cb133412b3 (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "product": "Linux",
          "programFiles": [
            "kernel/bpf/task_iter.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: return VMA snapshot from task_vma iterator\n\nHolding the per-VMA lock across the BPF program body creates a lock\nordering problem when helpers acquire locks that depend on mmap_lock:\n\n  vm_lock -\u003e i_rwsem -\u003e mmap_lock -\u003e vm_lock\n\nSnapshot the VMA under the per-VMA lock in _next() via memcpy(), then\ndrop the lock before returning. The BPF program accesses only the\nsnapshot.\n\nThe verifier only trusts vm_mm and vm_file pointers (see\nBTF_TYPE_SAFE_TRUSTED_OR_NULL in verifier.c). vm_file is reference-\ncounted with get_file() under the lock and released via fput() on the\nnext iteration or in _destroy(). vm_mm is already correct because\nlock_vma_under_rcu() verifies vma-\u003evm_mm == mm. All other pointers\nare left as-is by memcpy() since the verifier treats them as untrusted."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:24.356Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/83b8802c034e843b83a3e1ef6f30cdd4e9ec291c"
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          "url": "https://git.kernel.org/stable/c/4cbee026db54cad39c39db4d356100cb133412b3"
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      "title": "bpf: return VMA snapshot from task_vma iterator",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53084",
    "datePublished": "2026-06-24T16:30:24.356Z",
    "dateReserved": "2026-06-09T07:44:35.383Z",
    "dateUpdated": "2026-06-24T16:30:24.356Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-02",
      "epss": "0.00156",
      "percentile": "0.05205"
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  }
}


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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.


Detection rules are retrieved from Rulezet.