CVE-2026-97617 (GCVE-0-2026-97617)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-09-25 10:22
VLAI
Title
ring-buffer: Check resize_disabled before publishing the new subbuf order
Summary
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Check resize_disabled before publishing the new subbuf order ring_buffer_subbuf_order_set() stores the new order and only then walks the CPUs, returning -EBUSY if any of them has resizing disabled. A user mapped buffer has resizing disabled, and __rb_map_vma() reads buffer->subbuf_order without buffer->mutex, so an mmap of an already mapped CPU racing the failing order change sizes the mapping with the new order and inserts pages past the sub-buffer into the VMA. Check the CPUs before storing the new order.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7100 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 117c39200d9d760cbd5944bb89efb7b9c51965aa , < f2099644e1b2a2c0805c5240d63ab0522d9d0174 (git)
Affected: 117c39200d9d760cbd5944bb89efb7b9c51965aa , < 9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06 (git)
Affected: 117c39200d9d760cbd5944bb89efb7b9c51965aa , < 32bf47db9237c5b8b6f6aaa5356bb4c79d241f76 (git)
Affected: 117c39200d9d760cbd5944bb89efb7b9c51965aa , < d860c67c051685abb0460b593b193f0f45f4fa92 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Check resize_disabled before publishing the new subbuf order\n\nring_buffer_subbuf_order_set() stores the new order and only then walks\nthe CPUs, returning -EBUSY if any of them has resizing disabled. A user\nmapped buffer has resizing disabled, and __rb_map_vma() reads\nbuffer-\u003esubbuf_order without buffer-\u003emutex, so an mmap of an already\nmapped CPU racing the failing order change sizes the mapping with the\nnew order and inserts pages past the sub-buffer into the VMA.\n\nCheck the CPUs before storing the new order."
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        "dateUpdated": "2026-09-25T10:22:24.436Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-09-25T10:22:24.436Z",
    "dateReserved": "2026-09-24T16:01:01.159Z",
    "dateUpdated": "2026-09-25T10:22:24.436Z",
    "state": "PUBLISHED"
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      "percentile": "0.09167"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Check resize_disabled before publishing the new subbuf order\n\nring_buffer_subbuf_order_set() stores the new order and only then walks\nthe CPUs, returning -EBUSY if any of them has resizing disabled. A user\nmapped buffer has resizing disabled, and __rb_map_vma() reads\nbuffer-\u003esubbuf_order without buffer-\u003emutex, so an mmap of an already\nmapped CPU racing the failing order change sizes the mapping with the\nnew order and inserts pages past the sub-buffer into the VMA.\n\nCheck the CPUs before storing the new order."
          }
        ],
        "id": "CVE-2026-97617",
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        "metrics": {},
        "published": "2026-09-25T11:17:15.893",
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    }
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}



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