{"id":"CVE-2026-81013","revision":"cf574f5b7bf04aeea3a749463f8e3e8c","records":[{"revision":"cf574f5b7bf04aeea3a749463f8e3e8c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-81013","aliases":[],"title":"platform/x86: hp-bioscfg: fix heap OOB read on empty password write","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: fix heap OOB read on empty password write\n\nvalidate_password_input() computes length = strlen(buf) and then\nchecks buf[length - 1] to strip a trailing newline, without checking\nthat length is nonzero first. Writing an empty string (a bare '\\n')\nto current_password or new_password gives length == 0, and\nbuf[length - 1] reads buf[-1], one byte before the heap allocation\nholding the copied input.\n\nKASAN confirms this directly:\n\n  BUG: KASAN: slab-out-of-bounds in store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]\n  Read of size 1 at addr ffff88811bd8da9f by task sh/13740\n  ...\n  store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]\n  current_password_store+0x14/0x20 [hp_bioscfg]\n  ...\n  The buggy address is located 23 bytes to the right of\n  allocated 8-byte region [ffff88811bd8da80, ffff88811bd8da88)\n\nReproduced identically via new_password_store. Execution continues\npast the bad read (the garbage byte only affects whether \"length\" is\ndecremented by one), so the write completes and returns success; this\nis a pure information read past the buffer, not a crash, but it is\nstill an out-of-bounds access KASAN correctly flags.\n\nFix by only checking buf[length - 1] when length is nonzero.","state":0,"publishedAt":"2026-09-11T19:43:02.741+00:00","modifiedAt":"2026-10-19T08:46:38.578+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8646a3b5ee3a5b384a22a721f37c24274d974045\",\n                            \"lessThan\": \"21243c15e1d31f0df1517435e3a7784747f19043\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8646a3b5ee3a5b384a22a721f37c24274d974045\",\n                            \"lessThan\": \"cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8646a3b5ee3a5b384a22a721f37c24274d974045\",\n                            \"lessThan\": \"0f9aad08424882dd5714b53d29ae044060890752\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8646a3b5ee3a5b384a22a721f37c24274d974045\",\n                            \"lessThan\": \"b699e5c1f63a9e79946c35598c8a6f7af2c356b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8646a3b5ee3a5b384a22a721f37c24274d974045\",\n                            \"lessThan\": \"2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/21243c15e1d31f0df1517435e3a7784747f19043","https://git.kernel.org/stable/c/cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828","https://git.kernel.org/stable/c/0f9aad08424882dd5714b53d29ae044060890752","https://git.kernel.org/stable/c/b699e5c1f63a9e79946c35598c8a6f7af2c356b8","https://git.kernel.org/stable/c/2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81013","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-81013","identifiers":["CVE-2026-81013"]},"retained":false,"historicalAffected":[]}],"coverage":[]}