platform/x86: hp-bioscfg: fix heap OOB read in sk_store() and kek_store()
In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: fix heap OOB read in sk_store() and kek_store() sk_store() and kek_store() strip a trailing newline from the sysfs write before allocating the key buffer: length = count; if (buf[length - 1] == '\n') length--; bioscfg_drv.spm_data.signing_key = kmemdup(buf, length, GFP_KERNEL); but then pass the original "count" (not "length") as the copy size to hp_wmi_perform_query(), which memcpy()s that many bytes out of the "length"-sized allocation, reading one byte past it whenever the write ends in a newline, the normal case for a shell "echo" into sysfs. KASAN confirms this directly: BUG: KASAN: slab-out-of-bounds in hp_wmi_perform_query+0x1e9/0x460 [hp_bioscfg] Read of size 28 at addr ffff88813c8e2b80 by task python3/16022 ... sk_store+0xa7/0x240 [hp_bioscfg] kernfs_fop_write_iter+0x3e1/0x5d0 ... The buggy address is located 0 bytes inside of allocated 27-byte region [ffff88813c8e2b80, ffff88813c8e2b9b) Reproduced identically for kek_store, and at multiple write sizes (28, 57, 201 bytes), each time reading exactly one byte past a kmemdup() allocation one byte smaller than the write. Fix by passing "length" instead of "count" to hp_wmi_perform_query() in both functions.
CVE-2026-81014
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-2026-81014
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": "b2715aa2e1352c0060b9dcba57a2e465bbfbcd68",
"lessThan": "81db79fed115640736188e56595b1e9aec317d5b",
"versionType": "git"
},
{
"status": "affected",
"version": "b2715aa2e1352c0060b9dcba57a2e465bbfbcd68",
"lessThan": "4c6374dcb270d12907b880cf82a5a5ef21785fc3",
"versionType": "git"
},
{
"status": "affected",
"version": "b2715aa2e1352c0060b9dcba57a2e465bbfbcd68",
"lessThan": "7cd8fe01aba303a2382db0966eb6c8ab41d5f3c2",
"versionType": "git"
},
{
"status": "affected",
"version": "b2715aa2e1352c0060b9dcba57a2e465bbfbcd68",
"lessThan": "67b60703d7d8af1ca0e49f72e1bdb1ccecd41b5b",
"versionType": "git"
},
{
"status": "affected",
"version": "b2715aa2e1352c0060b9dcba57a2e465bbfbcd68",
"lessThan": "a7508c7959ff8d037327d377ed21a9c0eabe4674",
"versionType": "git"
}
],
"programFiles": [
"drivers/platform/x86/hp/hp-bioscfg/spmobj-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/spmobj-attributes.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81014
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34969 · Revision 1
- Added to Heist Feed
- Publisher date