{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97444", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.870Z", "datePublished": "2026-09-24T16:03:59.121Z", "dateUpdated": "2026-10-03T10:58:28.686Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:28.686Z" }, "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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.7, "baseSeverity": "HIGH" }, "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 '\\'/'^' 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->aml_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() → acpi_tb_load_namespace() → acpi_ns_load_table() → 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()'s ACPI_MOVE_32_TO_32 of an over-long nameseg and acpi_ps_peek_opcode()'s 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 '\\'/'^' 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, 1–2 bytes in acpi_ps_peek_opcode); the patched functions only advance parser_state->aml 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/acpica/psargs.c", "drivers/acpi/acpica/psparse.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3a8c1efc0fd3abb2d2b1254315f36db03abc88eb", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c917df56b73719a2d4cee1c4ab4a6626acb95315", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4f03d84c95a51436878cd750a14f8ca37eeb3112", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "38ee32a9ace6fae8965f059b38e6e7fb27b1e7ce", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "253d7272d01db9529c79b95205c0f859ef9f4f23", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4de2cffef5e6b5b79eec8c934df582459b818228", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "bdc35754012906dbf094be104b103ca3adfef6f7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/acpica/psargs.c", "drivers/acpi/acpica/psparse.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }