CVE-2026-97444 (GCVE-0-2026-97444)
Vulnerability from cvelistv5
Published
2026-09-24 16:03
Modified
2026-10-03 10:58
Severity ?
7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: add boundary checks in two places Add boundary checks in acpi_ps_get_next_namestring() and acpi_ps_peek_opcode() to prevent out-of-bounds access.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/psargs.c",
            "drivers/acpi/acpica/psparse.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3a8c1efc0fd3abb2d2b1254315f36db03abc88eb",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpica/psargs.c",
            "drivers/acpi/acpica/psparse.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "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": "5.10.271",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "2.6.12",
                  "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 two places\n\nAdd boundary checks in acpi_ps_get_next_namestring() and\nacpi_ps_peek_opcode() to prevent out-of-bounds access."
        }
      ],
      "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 AML that acpi_ps_get_next_namestring() and acpi_ps_peek_opcode() over-read is the platform DSDT/SSDT stream parsed by acpi_ns_execute_table() from acpi_load_tables() in acpi_bus_init(); those bytes come from local firmware tables, not from a network protocol message.\nAC:L - A DSDT/SSDT whose namestring (AML_MULTI_NAME_PREFIX count or a run of \u0027\\\u0027/\u0027^\u0027 prefixes) or final opcode sits against the AML buffer end makes acpi_ps_get_next_namestring() and acpi_ps_peek_opcode() read past parser_state-\u003eaml_end on every acpi_load_tables() parse; the table author sets those bytes and no race is required.\nPR:N - acpi_bus_init() calls acpi_load_tables() \u2192 acpi_tb_load_namespace() \u2192 acpi_ns_load_table() \u2192 acpi_ns_execute_table() at boot with no capability check, so the OOB in acpi_ps_get_next_namestring()/acpi_ps_peek_opcode() fires on firmware AML before any user account exists.\nUI:N - acpi_load_tables() parses the DSDT/SSDT automatically during acpi_bus_init() at boot; the victim does not need to mount media, open a file, or otherwise interact.\nS:U - acpi_ns_lookup()\u0027s ACPI_MOVE_32_TO_32 of an over-long nameseg and acpi_ps_peek_opcode()\u0027s ACPI_GET8 over-read kernel memory adjacent to the mapped AML buffer inside the host kernel; this is not a VM escape or IOMMU bypass.\nC:H - acpi_ps_get_next_namestring() does not cap \u0027\\\u0027/\u0027^\u0027 prefix walking or the AML_MULTI_NAME_PREFIX count byte, then acpi_ns_lookup() copies up to 255 four-byte namesegs via ACPI_MOVE_32_TO_32 past aml_end, so the out-of-bounds read is not limited to a few bytes.\nI:N - The demonstrated faults are heap-buffer-overflow reads (4 bytes in acpi_ns_lookup, 1\u20132 bytes in acpi_ps_peek_opcode); the patched functions only advance parser_state-\u003eaml and return a namestring pointer or opcode, and do not write past the AML buffer.\nA:H - The same over-read past the AML allocation in acpi_ns_lookup()/acpi_ps_peek_opcode() during acpi_load_tables() can touch unmapped memory and oops or panic the kernel at boot."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:28.686Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3a8c1efc0fd3abb2d2b1254315f36db03abc88eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/c917df56b73719a2d4cee1c4ab4a6626acb95315"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f03d84c95a51436878cd750a14f8ca37eeb3112"
        },
        {
          "url": "https://git.kernel.org/stable/c/38ee32a9ace6fae8965f059b38e6e7fb27b1e7ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/253d7272d01db9529c79b95205c0f859ef9f4f23"
        },
        {
          "url": "https://git.kernel.org/stable/c/4de2cffef5e6b5b79eec8c934df582459b818228"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdc35754012906dbf094be104b103ca3adfef6f7"
        }
      ],
      "title": "ACPICA: add boundary checks in two places",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97444",
    "datePublished": "2026-09-24T16:03:59.121Z",
    "dateReserved": "2026-09-24T14:53:16.870Z",
    "dateUpdated": "2026-10-03T10:58:28.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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