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GHSA-W3M4-CVQW-754J

Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-25 06:30

Details

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

ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)

Add overflow check for Index + Length to prevent integer overflow when calculating the truncation length. This prevents negative size parameter being passed to memcpy().

Severity

8.4 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-97451"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-24T17:17:23Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)\n\nAdd overflow check for Index + Length to prevent integer overflow\nwhen calculating the truncation length. This prevents negative\nsize parameter being passed to memcpy().",
  "id": "GHSA-w3m4-cvqw-754j",
  "modified": "2026-09-25T06:30:31Z",
  "published": "2026-09-24T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97451"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e2021f49e64b3c8a9aa880d0c62a218bfe147ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b96401812cbfbb4803faabeefa1f20b8562268b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0d89f2e16a874e0f8fb17045da293e8bedf8b21"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-97451 (GCVE-0-2026-97451)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:04 – Updated: 2026-09-25 05:10

Title

ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)

Summary

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op) Add overflow check for Index + Length to prevent integer overflow when calculating the truncation length. This prevents negative size parameter being passed to memcpy().

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/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/d0d89f2e16a874e0f…
https://git.kernel.org/stable/c/b96401812cbfbb480…
https://git.kernel.org/stable/c/0e2021f49e64b3c8a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d0d89f2e16a874e0f8fb17045da293e8bedf8b21 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b96401812cbfbb4803faabeefa1f20b8562268b3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0e2021f49e64b3c8a9aa880d0c62a218bfe147ce (git) Affected: 0 , < 6.12.111 (semver) Affected: 0 , < 6.18.53 (semver)
Linux	Linux	Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/exoparg3.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d0d89f2e16a874e0f8fb17045da293e8bedf8b21",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "b96401812cbfbb4803faabeefa1f20b8562268b3",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "0e2021f49e64b3c8a9aa880d0c62a218bfe147ce",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/exoparg3.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "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": "6.12.111",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)\n\nAdd overflow check for Index + Length to prevent integer overflow\nwhen calculating the truncation length. This prevents negative\nsize parameter being passed to memcpy()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The wrapping Index and Length are AML integer operands of Mid() in acpi_ex_opcode_3A_1T_1R(), taken from the local DSDT/SSDT. The path is acpi_bus_init() \u2192 acpi_load_tables() \u2192 acpi_tb_load_namespace() \u2192 acpi_ns_load_table() \u2192 acpi_ns_execute_table() \u2192 acpi_ds_exec_end_op(); no network protocol carries those integers.\nAC:L - A Mid() whose Index is in [1, Source.length) and Length is Ones (UINT64_MAX) makes (index+length) wrap so truncation is skipped; the STRING path then kzalloc(length+1)==kzalloc(0) and memcpy(..., length) on every acpi_ns_execute_table() of that table. The table author sets those operands; no race.\nPR:N - acpi_bus_init() calls acpi_load_tables(), which runs module-level Mid() in acpi_ns_execute_table() with no capable() or uid check. A compromised DSDT/SSDT is enough; no Linux account, user namespace, or /sys/kernel/config/acpi/table write is required.\nUI:N - acpi_ns_execute_table() evaluates definition-block AML, including a module-level Mid(), automatically during acpi_load_tables() at boot. No mount, file-open, or other victim action is required at trigger time.\nS:U - The overflowing memcpy in acpi_ex_opcode_3A_1T_1R() corrupts the host kernel heap around the Mid() result object from ACPI_ALLOCATE_ZEROED; it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - After the wrap, memcpy() in acpi_ex_opcode_3A_1T_1R() reads the untruncated length (UINT64_MAX) bytes from operand[0]-\u003estring.pointer+index, whose object is only operand[0]-\u003estring.length (u32) bytes, an unbounded kernel heap over-read rather than a few-byte leak.\nI:H - On ACPI_TYPE_STRING, ACPI_ALLOCATE_ZEROED(length+1) wraps to a 0-size allocation when length is UINT64_MAX, then memcpy writes that same untruncated length into it\u2014an out-of-bounds write/heap overflow exploitable for control-flow hijack.\nA:H - memcpy of the untruncated length into the wrapped 0-size STRING buffer in acpi_ex_opcode_3A_1T_1R() oopses or panics the kernel during acpi_ns_execute_table() or a later Mid() method evaluation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T05:10:43.926Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d0d89f2e16a874e0f8fb17045da293e8bedf8b21"
        },
        {
          "url": "https://git.kernel.org/stable/c/b96401812cbfbb4803faabeefa1f20b8562268b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/0e2021f49e64b3c8a9aa880d0c62a218bfe147ce"
        }
      ],
      "title": "ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97451",
    "datePublished": "2026-09-24T16:04:07.520Z",
    "dateReserved": "2026-09-24T14:53:16.871Z",
    "dateUpdated": "2026-09-25T05:10:43.926Z",
    "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.

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.
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GHSA-W3M4-CVQW-754J

CVE-2026-97451 (GCVE-0-2026-97451)

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