# CVE-2026-81012

## Summary

- **CVE ID:** CVE-2026-81012
- **Severity:** HIGH
- **CVSS Score:** 8.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: hp-bioscfg: fix off-by-one write in hp_get_string_from_buffer()

hp_get_string_from_buffer() clamps the converted string length against
the destination buffer size with "size > dst_size", so when the
converted length is exactly equal to dst_size, conv_dst_size is left
at dst_size and the unconditional NUL terminator write

	dst[conv_dst_size] = 0;

lands one byte past the destination buffer. This is the same shape of
bug as the previously fixed off-by-one in hp_convert_hexstr_to_str():
the buffer is sized correctly for the content, but the terminator
write is never checked against that size.

Fix by changing the comparison to ">=" so conv_dst_size is always left
with room for the terminator.

All fixed-size destinations that reach this function (path[512],
current_value[512], current_password/current_value[64], and the
per-entry buffers in encodings[][512] and prerequisites[][512]) are
affected.

## Affected Products

- Linux — Linux (a34fc329b1895fc8a6eb12099adc47009421ba6a)
- Linux — Linux (6.6)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/3cc772d0154799961f032e5a992d4a50523e291a)
- [CNA](https://git.kernel.org/stable/c/b15b334fbc3c0c46440f8a892ebf62164fca23d6)
- [CNA](https://git.kernel.org/stable/c/ddf98cf33529714b3ba1a158afb1db5b0f759a1a)
- [CNA](https://git.kernel.org/stable/c/dc03f05e419f3460342fb7564884f244622634b6)
- [CNA](https://git.kernel.org/stable/c/8f5aa1506cdddea6b33584c2445b9ce99eeddb64)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 4.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._