{"id":"CVE-2026-81012","summary":"platform/x86: hp-bioscfg: fix off-by-one write in hp_get_string_from_buffer()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: fix off-by-one write in hp_get_string_from_buffer()\n\nhp_get_string_from_buffer() clamps the converted string length against\nthe destination buffer size with \"size \u003e dst_size\", so when the\nconverted length is exactly equal to dst_size, conv_dst_size is left\nat dst_size and the unconditional NUL terminator write\n\n\tdst[conv_dst_size] = 0;\n\nlands one byte past the destination buffer. This is the same shape of\nbug as the previously fixed off-by-one in hp_convert_hexstr_to_str():\nthe buffer is sized correctly for the content, but the terminator\nwrite is never checked against that size.\n\nFix by changing the comparison to \"\u003e=\" so conv_dst_size is always left\nwith room for the terminator.\n\nAll fixed-size destinations that reach this function (path[512],\ncurrent_value[512], current_password/current_value[64], and the\nper-entry buffers in encodings[][512] and prerequisites[][512]) are\naffected.","modified":"2026-09-13T03:47:17.449026988Z","published":"2026-09-11T19:43:02.082Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81012.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3cc772d0154799961f032e5a992d4a50523e291a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b15b334fbc3c0c46440f8a892ebf62164fca23d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc03f05e419f3460342fb7564884f244622634b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ddf98cf33529714b3ba1a158afb1db5b0f759a1a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81012.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81012"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a34fc329b1895fc8a6eb12099adc47009421ba6a"},{"fixed":"3cc772d0154799961f032e5a992d4a50523e291a"},{"fixed":"b15b334fbc3c0c46440f8a892ebf62164fca23d6"},{"fixed":"ddf98cf33529714b3ba1a158afb1db5b0f759a1a"},{"fixed":"dc03f05e419f3460342fb7564884f244622634b6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81012.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81012.json"}}],"schema_version":"1.9.0"}