CVE-2026-81013

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81013", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.813Z", "datePublished": "2026-09-11T19:43:02.741Z", "dateUpdated": "2026-10-19T08:46:38.578Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:38.578Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c"], "versions": [{"version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "lessThan": "21243c15e1d31f0df1517435e3a7784747f19043", "status": "affected", "versionType": "git"}, {"version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "lessThan": "cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828", "status": "affected", "versionType": "git"}, {"version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "lessThan": "0f9aad08424882dd5714b53d29ae044060890752", "status": "affected", "versionType": "git"}, {"version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "lessThan": "b699e5c1f63a9e79946c35598c8a6f7af2c356b8", "status": "affected", "versionType": "git"}, {"version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "lessThan": "2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/21243c15e1d31f0df1517435e3a7784747f19043"}, {"url": "https://git.kernel.org/stable/c/cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828"}, {"url": "https://git.kernel.org/stable/c/0f9aad08424882dd5714b53d29ae044060890752"}, {"url": "https://git.kernel.org/stable/c/b699e5c1f63a9e79946c35598c8a6f7af2c356b8"}, {"url": "https://git.kernel.org/stable/c/2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab"}], "title": "platform/x86: hp-bioscfg: fix heap OOB read on empty password write", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "21243c15e1d31f0df1517435e3a7784747f19043", "status": "affected", "version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "versionType": "git"}, {"lessThan": "cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828", "status": "affected", "version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "versionType": "git"}, {"lessThan": "0f9aad08424882dd5714b53d29ae044060890752", "status": "affected", "version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "versionType": "git"}, {"lessThan": "b699e5c1f63a9e79946c35598c8a6f7af2c356b8", "status": "affected", "version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "versionType": "git"}, {"lessThan": "2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab", "status": "affected", "version": "8646a3b5ee3a5b384a22a721f37c24274d974045", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-81013", "lastModified": "2026-10-19T09:17:34.727", "metrics": {}, "published": "2026-09-11T20:19:10.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f9aad08424882dd5714b53d29ae044060890752"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21243c15e1d31f0df1517435e3a7784747f19043"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b699e5c1f63a9e79946c35598c8a6f7af2c356b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel hp-bioscfg: Information disclosure due to heap out-of-bounds read", "id": "2532351", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532351"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the hp-bioscfg component of the Linux kernel. A local user could trigger a heap out-of-bounds read by writing an empty string to the current_password or new_password fields. This occurs because the validate_password_input() function attempts to access memory before the allocated buffer when processing an empty input. This vulnerability could lead to information disclosure by reading one byte of data past the buffer."], "name": "CVE-2026-81013", "public_date": "2026-09-11T19:43:02Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81013\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81013\nhttps://git.kernel.org/stable/c/0f9aad08424882dd5714b53d29ae044060890752\nhttps://git.kernel.org/stable/c/2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab\nhttps://git.kernel.org/stable/c/b699e5c1f63a9e79946c35598c8a6f7af2c356b8\nhttps://git.kernel.org/stable/c/cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8646a3b5ee3a5b384a22a721f37c24274d974045,cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8646a3b5ee3a5b384a22a721f37c24274d974045,0f9aad08424882dd5714b53d29ae044060890752)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8646a3b5ee3a5b384a22a721f37c24274d974045,b699e5c1f63a9e79946c35598c8a6f7af2c356b8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8646a3b5ee3a5b384a22a721f37c24274d974045,2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.109,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.50,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.4,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T03:15:06.701888+00:00", "updated": "2026-09-21T02:15:08.506722+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}