CVE-2026-81011

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81011", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.813Z", "datePublished": "2026-09-11T19:43:01.422Z", "dateUpdated": "2026-10-19T08:46:36.444Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:36.444Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: pass validated element count to package parsers\n\nThe per-type package parsers are handed the wrong element count.\n\nhp_init_bios_package_attribute() validates obj->package.count and then\ncalls one of the five hp_populate_*_package_data() wrappers (string,\ninteger, enumeration, ordered list, password). Each wrapper forwards a\ncount to its hp_populate_*_elements_from_package() parser, but instead\nof forwarding the validated obj->package.count it derives the count\nfrom elements[0]. elements[0] is the NAME field and is always an\nACPI_TYPE_STRING, so reading ->package.count from it in fact reads\n->string.length through the union acpi_object. The parsers thus bound\nthemselves against the length of the name string rather than against\nthe real number of elements in the package.\n\nThis is safe today because hp_init_bios_package_attribute() refuses any\npackage that has fewer than the type's element count, so a parser only\never runs on a full package and never reads past it regardless of the\nbogus bound.\n\nAn upcoming change relaxes that check to accept shorter packages. Once\na parser can receive fewer elements than its per-type count, a bound\ntaken from the name length no longer reflects the array size, and the\n\"elem < count\" loop conditions and \"elem + n >= count\" sub-loop guards\nread past the end of elements[] - an out-of-bounds heap read.\n\nForward the validated obj->package.count to every *_package_data()\nwrapper so the parsers bound themselves against the real package size.\nThis does not change behaviour for the packages that enumerate\ncorrectly today and is a prerequisite for accepting shorter packages\nsafely."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The hp-bioscfg package parsers run during local driver initialization on ACPI/WMI objects fetched by wmi_query_block(); there is no network, adjacent-radio, or USB/peripheral path into this code.\nAC:L - A NAME whose string.length exceeds the real package.count makes the nested elem+n bounds and outer elem<count loops walk past elements[] whenever a multi-element field such as PREREQUISITES is present; a crafted or shortened firmware package triggers that over-read deterministically, with no race or attacker-uncontrollable layout.\nPR:L - hp-bioscfg autoloads on HP WMI GUIDs, and parsed fields are copied into world-readable sysfs attributes under firmware-attributes/hp-bioscfg; an ordinary local user can read that metadata, and no capability or user-namespace gate protects the path.\nUI:N - Parsing occurs in hp_init()/hp_init_bios_attributes() on module load or built-in init; exploitation does not require a victim to open a file, mount a filesystem, or take any other action.\nS:U - The out-of-bounds heap read, any resulting kernel-memory disclosure, and any oops remain inside the same kernel security authority; this is not a VM, IOMMU, or sandbox escape.\nC:H - Out-of-bounds union acpi_object slots are treated as STRING objects, so hp_convert_hexstr_to_str() follows an OOB pointer and length and copies the result into sysfs-visible buffers, yielding an unbounded kernel read rather than a few-byte leak.\nI:N - The flaw is an out-of-bounds read; parsed values are stored through bounded strscpy and scalar assignment into fixed-size driver fields, with no OOB write or control-flow hijack primitive.\nA:H - An out-of-bounds descriptor with a bogus string.pointer is dereferenced by hp_convert_hexstr_to_str(), which causes a kernel oops or panic during driver initialization."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/bioscfg.c", "drivers/platform/x86/hp/hp-bioscfg/bioscfg.h", "drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/int-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/string-attributes.c"], "versions": [{"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "lessThan": "467e53f231f77a1677191b8cdabdaf1448439d55", "status": "affected", "versionType": "git"}, {"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "lessThan": "436017808c7cbcdb5e49b2142090d4391e3de9a6", "status": "affected", "versionType": "git"}, {"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "lessThan": "a38127df99ae8b1851560b35b837c9952416143a", "status": "affected", "versionType": "git"}, {"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "lessThan": "400cbc3ccc88a5ad37cd85056224635ce9eba018", "status": "affected", "versionType": "git"}, {"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "lessThan": "e0ddfd77c0c320b7d12b6c9169303b140b798775", "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/platform/x86/hp/hp-bioscfg/bioscfg.c", "drivers/platform/x86/hp/hp-bioscfg/bioscfg.h", "drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/int-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/string-attributes.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.6", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/467e53f231f77a1677191b8cdabdaf1448439d55"}, {"url": "https://git.kernel.org/stable/c/436017808c7cbcdb5e49b2142090d4391e3de9a6"}, {"url": "https://git.kernel.org/stable/c/a38127df99ae8b1851560b35b837c9952416143a"}, {"url": "https://git.kernel.org/stable/c/400cbc3ccc88a5ad37cd85056224635ce9eba018"}, {"url": "https://git.kernel.org/stable/c/e0ddfd77c0c320b7d12b6c9169303b140b798775"}], "title": "platform/x86: hp-bioscfg: pass validated element count to package parsers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/bioscfg.c", "drivers/platform/x86/hp/hp-bioscfg/bioscfg.h", "drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/int-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/string-attributes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "467e53f231f77a1677191b8cdabdaf1448439d55", "status": "affected", "version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "versionType": "git"}, {"lessThan": "436017808c7cbcdb5e49b2142090d4391e3de9a6", "status": "affected", "version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "versionType": "git"}, {"lessThan": "a38127df99ae8b1851560b35b837c9952416143a", "status": "affected", "version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "versionType": "git"}, {"lessThan": "400cbc3ccc88a5ad37cd85056224635ce9eba018", "status": "affected", "version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "versionType": "git"}, {"lessThan": "e0ddfd77c0c320b7d12b6c9169303b140b798775", "status": "affected", "version": "a34fc329b1895fc8a6eb12099adc47009421ba6a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/bioscfg.c", "drivers/platform/x86/hp/hp-bioscfg/bioscfg.h", "drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/int-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c", "drivers/platform/x86/hp/hp-bioscfg/string-attributes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: pass validated element count to package parsers\n\nThe per-type package parsers are handed the wrong element count.\n\nhp_init_bios_package_attribute() validates obj->package.count and then\ncalls one of the five hp_populate_*_package_data() wrappers (string,\ninteger, enumeration, ordered list, password). Each wrapper forwards a\ncount to its hp_populate_*_elements_from_package() parser, but instead\nof forwarding the validated obj->package.count it derives the count\nfrom elements[0]. elements[0] is the NAME field and is always an\nACPI_TYPE_STRING, so reading ->package.count from it in fact reads\n->string.length through the union acpi_object. The parsers thus bound\nthemselves against the length of the name string rather than against\nthe real number of elements in the package.\n\nThis is safe today because hp_init_bios_package_attribute() refuses any\npackage that has fewer than the type's element count, so a parser only\never runs on a full package and never reads past it regardless of the\nbogus bound.\n\nAn upcoming change relaxes that check to accept shorter packages. Once\na parser can receive fewer elements than its per-type count, a bound\ntaken from the name length no longer reflects the array size, and the\n\"elem < count\" loop conditions and \"elem + n >= count\" sub-loop guards\nread past the end of elements[] - an out-of-bounds heap read.\n\nForward the validated obj->package.count to every *_package_data()\nwrapper so the parsers bound themselves against the real package size.\nThis does not change behaviour for the packages that enumerate\ncorrectly today and is a prerequisite for accepting shorter packages\nsafely."}], "id": "CVE-2026-81011", "lastModified": "2026-10-19T09:17:34.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:09.927", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/400cbc3ccc88a5ad37cd85056224635ce9eba018"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/436017808c7cbcdb5e49b2142090d4391e3de9a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/467e53f231f77a1677191b8cdabdaf1448439d55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a38127df99ae8b1851560b35b837c9952416143a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e0ddfd77c0c320b7d12b6c9169303b140b798775"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: hp-bioscfg out-of-bounds read due to incorrect package element count", "id": "2532502", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532502"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's hp-bioscfg module. The module's package parsers incorrectly determine the number of elements in a package, using a value derived from a name string rather than the true package size. While currently prevented by existing validation, a future change to the kernel will allow shorter packages, enabling a local attacker to craft a malicious package. This could result in an out-of-bounds heap read, potentially leading to information disclosure or system instability."], "name": "CVE-2026-81011", "public_date": "2026-09-11T19:43:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81011\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81011\nhttps://git.kernel.org/stable/c/400cbc3ccc88a5ad37cd85056224635ce9eba018\nhttps://git.kernel.org/stable/c/436017808c7cbcdb5e49b2142090d4391e3de9a6\nhttps://git.kernel.org/stable/c/a38127df99ae8b1851560b35b837c9952416143a\nhttps://git.kernel.org/stable/c/e0ddfd77c0c320b7d12b6c9169303b140b798775"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,436017808c7cbcdb5e49b2142090d4391e3de9a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a38127df99ae8b1851560b35b837c9952416143a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,400cbc3ccc88a5ad37cd85056224635ce9eba018)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e0ddfd77c0c320b7d12b6c9169303b140b798775)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.109)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.2.4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T21:30:16.944398+00:00", "updated": "2026-09-21T02:30:08.190768+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}