platform/x86: hp-bioscfg: fix heap OOB read in sk_store() and kek_store()
Summary
| CVE | CVE-2026-81014 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-11 20:19:10 UTC |
| Updated | 2026-09-11 20:19:10 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001680000 probability, percentile 0.063320000 (date 2026-09-13)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected b2715aa2e1352c0060b9dcba57a2e465bbfbcd68 4c6374dcb270d12907b880cf82a5a5ef21785fc3 git | Not specified |
| CNA | Linux | Linux | affected b2715aa2e1352c0060b9dcba57a2e465bbfbcd68 7cd8fe01aba303a2382db0966eb6c8ab41d5f3c2 git | Not specified |
| CNA | Linux | Linux | affected b2715aa2e1352c0060b9dcba57a2e465bbfbcd68 67b60703d7d8af1ca0e49f72e1bdb1ccecd41b5b git | Not specified |
| CNA | Linux | Linux | affected b2715aa2e1352c0060b9dcba57a2e465bbfbcd68 a7508c7959ff8d037327d377ed21a9c0eabe4674 git | Not specified |
| CNA | Linux | Linux | affected 6.6 | Not specified |
| CNA | Linux | Linux | unaffected 6.6 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.109 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.50 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.4 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/4c6374dcb270d12907b880cf82a5a5ef21785fc3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a7508c7959ff8d037327d377ed21a9c0eabe4674 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/67b60703d7d8af1ca0e49f72e1bdb1ccecd41b5b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7cd8fe01aba303a2382db0966eb6c8ab41d5f3c2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.