CVE-2026-81012

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.