CVE-2026-81012 in Linux
Zusammenfassung
von MITRE • 12.09.2026
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.
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