CVE-2026-97454 (GCVE-0-2026-97454)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:04 – Updated: 2026-09-25 05:10
VLAI
Title
ACPICA: add boundary checks in acpi_ps_get_next_field()
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: add boundary checks in acpi_ps_get_next_field() Add boundary checks in acpi_ps_get_next_field() to prevent out-of-bounds access.
Severity
7.7 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < add715fc1ef5b0a71afe22b3f02aa28775d9ba62 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bc5b2158c7626e3e8a78c5bb93ce0a734a26b84a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e15aa60de0256d63df2331bf5a4bc4dd287504cd (git)
Affected: 0 , < 6.12.111 (semver)
Affected: 0 , < 6.18.53 (semver)
guessed Create a notification for this product.
Linux Linux Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/psargs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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          "nodes": [
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                  "vulnerable": true
                },
                {
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                  "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: add boundary checks in acpi_ps_get_next_field()\n\nAdd boundary checks in acpi_ps_get_next_field() to prevent out-of-bounds\naccess."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The truncated bytes are a Field/BankField/IndexField FieldList inside a local DSDT/SSDT, not a network PDU. acpi_bus_init() calls acpi_load_tables() \u2192 acpi_tb_load_namespace() \u2192 acpi_ns_load_table() \u2192 acpi_ns_execute_table() \u2192 acpi_ps_parse_aml() \u2192 acpi_ps_parse_loop() \u2192 acpi_ps_get_next_arg(ARGP_FIELDLIST) \u2192 acpi_ps_get_next_field().\nAC:L - A NamedField with fewer than ACPI_NAMESEG_SIZE bytes left before aml_end makes ACPI_MOVE_32_TO_32(\u0026name, parser_state-\u003eaml) over-read on every load; AccessField/ExtAccessField similarly ACPI_GET8 past the buffer. The table author sets those AML bytes, with no race.\nPR:N - acpi_bus_init() calls acpi_load_tables() at boot with no capable() check, so a DSDT/SSDT whose FieldList is truncated reaches acpi_ps_get_next_field() with no Linux uid or user-namespace privilege.\nUI:N - acpi_ns_execute_table() parses module-level Field/BankField/IndexField opcodes while acpi_load_tables() runs from acpi_bus_init() on ordinary power-on; no victim mount, sysfs open, or module load is required to reach acpi_ps_get_next_field().\nS:U - The over-read is of kernel heap adjacent to the ACPI table buffer parsed by host ACPICA in acpi_ps_get_next_field(); it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - Without aml_end checks, acpi_ps_get_next_field() ACPI_MOVE_32_TO_32-reads a NameSeg and ACPI_GET8-reads Access/ExtAccess bytes past the table heap object (ASAN: 4-byte read past a 175-byte allocation). ARGP_FIELDLIST keeps looping while aml \u003c pkg_end from the attacker-chosen Field PkgLength, so the walk is not capped to a few header bytes.\nI:N - ASAN reports a READ of size 4 in AcpiPsGetNextField; ACPI_MOVE_32_TO_32 and ACPI_GET8 only fill local name/access_type variables and the newly allocated field op. The function never stores through parser_state-\u003eaml, so there is no out-of-bounds write.\nA:H - The ASAN heap-buffer-overflow is the NamedField ACPI_MOVE_32_TO_32 immediately past the 175-byte table allocation (shadow redzone). A read off that slab object during acpi_load_tables() can oops or panic the kernel at boot."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T05:10:46.392Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/add715fc1ef5b0a71afe22b3f02aa28775d9ba62"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc5b2158c7626e3e8a78c5bb93ce0a734a26b84a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e15aa60de0256d63df2331bf5a4bc4dd287504cd"
        }
      ],
      "title": "ACPICA: add boundary checks in acpi_ps_get_next_field()",
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        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97454",
    "datePublished": "2026-09-24T16:04:10.819Z",
    "dateReserved": "2026-09-24T14:53:16.871Z",
    "dateUpdated": "2026-09-25T05:10:46.392Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-25",
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      "percentile": "0.02752"
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    "nvd": {
      "cve": {
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/acpi/acpica/psargs.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
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                    "versionType": "semver"
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                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: add boundary checks in acpi_ps_get_next_field()\n\nAdd boundary checks in acpi_ps_get_next_field() to prevent out-of-bounds\naccess."
          }
        ],
        "id": "CVE-2026-97454",
        "lastModified": "2026-09-25T05:17:06.553",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.7,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2026-09-24T17:17:23.823",
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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