CVE-2026-64510 (GCVE-0-2026-64510)
Vulnerability from cvelistv5
Published
2026-07-25 08:52
Modified
2026-08-17 04:57
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup If acpi_nfit_init() fails after adding the acpi_desc object to the acpi_descs list, that object is never removed from that list because the acpi_nfit_shutdown() devm action is not added for the NFIT device in that case. Next, the acpi_nfit_init() failure causes acpi_nfit_probe() to fail, the acpi_desc object is freed, and a dangling pointer is left behind in the acpi_descs. Any subsequent ACPI Machine Check Exception will trigger nfit_handle_mce() which iterates over acpi_descs and so a use-after-free will occur. Moreover, if acpi_nfit_probe() returns 0 after installing a notify handler for the NFIT device and without allocating the acpi_desc object and setting the NFIT device's driver data pointer, the acpi_desc object will be allocated by acpi_nfit_update_notify() and acpi_nfit_init() will be called to initialize it. Regardless of whether or not acpi_nfit_init() fails in that case, the acpi_nfit_shutdown() devm action is not added for the NFIT device and acpi_desc is never removed from the acpi_descs list. If the acpi_desc object is freed subsequently on driver removal, any subsequent ACPI MCE will lead to a use-after-free like in the previous case. To address the first issue mentioned above, make acpi_nfit_probe() call acpi_nfit_shutdown() directly on acpi_nfit_init() failures and to address the other one, add a remove callback to the driver and make it call acpi_nfit_shutdown(). Also, since it is now possible to pass NULL to acpi_nfit_shutdown() or the acpi_desc object passed to it may not have been initialized, add checks against NULL for acpi_desc and its nvdimm_bus field to that function and make acpi_nfit_unregister() clear the latter after unregistering the NVDIMM bus.
References
Impacted products
Vendor Product Version
Linux Linux Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
Version: a61fe6f7902ecaa89d5e6c709490fc4324927134
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/nfit/core.c"
          ],
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: NFIT: core: Fix acpi_nfit_init() error cleanup\n\nIf acpi_nfit_init() fails after adding the acpi_desc object to the\nacpi_descs list, that object is never removed from that list because\nthe acpi_nfit_shutdown() devm action is not added for the NFIT device\nin that case.  Next, the acpi_nfit_init() failure causes\nacpi_nfit_probe() to fail, the acpi_desc object is freed, and a\ndangling pointer is left behind in the acpi_descs.  Any subsequent\nACPI Machine Check Exception will trigger nfit_handle_mce() which\niterates over acpi_descs and so a use-after-free will occur.\n\nMoreover, if acpi_nfit_probe() returns 0 after installing a notify\nhandler for the NFIT device and without allocating the acpi_desc\nobject and setting the NFIT device\u0027s driver data pointer, the\nacpi_desc object will be allocated by acpi_nfit_update_notify()\nand acpi_nfit_init() will be called to initialize it.  Regardless\nof whether or not acpi_nfit_init() fails in that case, the\nacpi_nfit_shutdown() devm action is not added for the NFIT device\nand acpi_desc is never removed from the acpi_descs list.  If the\nacpi_desc object is freed subsequently on driver removal, any\nsubsequent ACPI MCE will lead to a use-after-free like in the\nprevious case.\n\nTo address the first issue mentioned above, make acpi_nfit_probe()\ncall acpi_nfit_shutdown() directly on acpi_nfit_init() failures and\nto address the other one, add a remove callback to the driver and\nmake it call acpi_nfit_shutdown().  Also, since it is now possible to\npass NULL to acpi_nfit_shutdown() or the acpi_desc object passed to it\nmay not have been initialized, add checks against NULL for acpi_desc and\nits nvdimm_bus field to that function and make acpi_nfit_unregister()\nclear the latter after unregistering the NVDIMM bus."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - No network, wireless, or user-namespace interface reaches this path; the highest reasonable attack path is a local process triggering a qualifying MCE through an accessible poisoned memory mapping.\nAC:H - Exploitation requires a descriptor already made stale by NFIT initialization failure or late initialization followed by removal, plus a usable-address uncorrectable MCE. An unprivileged attacker cannot reliably create all these firmware and hardware conditions.\nPR:L - Once the stale state and poisoned mapping exist, a basic local account can trigger the MCE and spray reclaimed heap memory without capabilities. Deterministic driver removal or software MCE injection is root-only, but is unnecessary in this higher-severity plausible scenario.\nUI:N - No action by another user is required after the vulnerable system state exists; the attacker can access the relevant memory directly.\nS:U - The UAF compromises the same host kernel and does not inherently cross a VM, IOMMU, or other security-authority boundary.\nC:H - The freed descriptor and its subordinate SPA objects contain attacker-reclaimable pointers and linked lists, permitting controlled kernel-memory dereferences and potential arbitrary disclosure.\nI:H - Locking the freed embedded mutex already writes to reclaimed memory, while controlled bus, region, and list pointers can provide stronger write primitives and potential kernel code execution.\nA:H - The dangling descriptor is traversed during MCE processing and can cause an invalid mutex operation, invalid pointer dereference, deadlock, oops, or kernel panic, as established by the [published record](https://nvd.nist.gov/vuln/detail/CVE-2026-64510)."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:57:01.009Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ee82078e776ae31266cc70fdf62ac17c3c6f100a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ff054cc02a763914773b026cacb429e5fbf64fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c127dbd832bd4b9aef8a749d9f491b74042f9b47"
        },
        {
          "url": "https://git.kernel.org/stable/c/df7c92216a1583a76cb0cbf2f21cd68870609b05"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d69235bdc581a4346e9bcd6a8bea37d3e1abd25"
        },
        {
          "url": "https://git.kernel.org/stable/c/38bf27511ef41bffebd157ec3eba41fc89ba59cd"
        }
      ],
      "title": "ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64510",
    "datePublished": "2026-07-25T08:52:03.208Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-08-17T04:57:01.009Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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