platform/x86: hp-bioscfg: pass validated element count to package parsers
In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: pass validated element count to package parsers The per-type package parsers are handed the wrong element count. hp_init_bios_package_attribute() validates obj->package.count and then calls one of the five hp_populate_*_package_data() wrappers (string, integer, enumeration, ordered list, password). Each wrapper forwards a count to its hp_populate_*_elements_from_package() parser, but instead of forwarding the validated obj->package.count it derives the count from elements[0]. elements[0] is the NAME field and is always an ACPI_TYPE_STRING, so reading ->package.count from it in fact reads ->string.length through the union acpi_object. The parsers thus bound themselves against the length of the name string rather than against the real number of elements in the package. This is safe today because hp_init_bios_package_attribute() refuses any package that has fewer than the type's element count, so a parser only ever runs on a full package and never reads past it regardless of the bogus bound. An upcoming change relaxes that check to accept shorter packages. Once a parser can receive fewer elements than its per-type count, a bound taken from the name length no longer reflects the array size, and the "elem < count" loop conditions and "elem + n >= count" sub-loop guards read past the end of elements[] - an out-of-bounds heap read. Forward the validated obj->package.count to every *_package
CVE-2026-81011
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81011
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a",
"lessThan": "467e53f231f77a1677191b8cdabdaf1448439d55",
"versionType": "git"
},
{
"status": "affected",
"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a",
"lessThan": "436017808c7cbcdb5e49b2142090d4391e3de9a6",
"versionType": "git"
},
{
"status": "affected",
"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a",
"lessThan": "a38127df99ae8b1851560b35b837c9952416143a",
"versionType": "git"
},
{
"status": "affected",
"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a",
"lessThan": "400cbc3ccc88a5ad37cd85056224635ce9eba018",
"versionType": "git"
},
{
"status": "affected",
"version": "a34fc329b1895fc8a6eb12099adc47009421ba6a",
"lessThan": "e0ddfd77c0c320b7d12b6c9169303b140b798775",
"versionType": "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"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"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"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81011
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34966 · Revision 1
- Added to Heist Feed
- Publisher date