{"schema":"threatline.record/2","record":{"id":"CVE-2026-99017","aliases":[],"summary":"riscv: errata: select RISCV_ALTERNATIVE_EARLY for THEAD GHOSTWRITE","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: errata: select RISCV_ALTERNATIVE_EARLY for THEAD GHOSTWRITE\n\nerrata_probe_ghostwrite() only marks the CPU as vulnerable when it is\ncalled at the RISCV_ALTERNATIVES_EARLY_BOOT stage, and the mitigation\nin ghostwrite_enable_mitigation() only takes effect if the vulnerable\nstate was recorded before the boot alternatives are patched.\n\nThe early boot stage is only executed when CONFIG_RISCV_ALTERNATIVE_EARLY\nis enabled, which currently is only selected by ERRATA_THEAD_MAE. In a\nkernel built with ERRATA_THEAD_GHOSTWRITE=y but ERRATA_THEAD_MAE=n, the\nearly alternatives never run, so ghostwrite_state is never set to\nVULNERABLE: ghostwrite_enable_mitigation() returns false, xtheadvector\nremains enabled, and sysfs reports \"Not affected\" on a vulnerable\nT-Head C9xx CPU.\n\nSelect RISCV_ALTERNATIVE_EARLY from ERRATA_THEAD_GHOSTWRITE so that the\nvulnerability is detected in the early boot stage and the default\nmitigation is applied.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99017","source_modified_at":"2026-10-24T14:10:04.808Z","fetched_at":"2026-10-24T14:26:37.433577Z","product":"Linux","vendor":"Linux","versions":[{"version":"4bf97069239bcfca9840936313c7ac35a6e04488","lessThan":"fa465a7819ecbe5801b78c088d3cadaf2664b8ca","status":"affected","versionType":"git"},{"version":"4bf97069239bcfca9840936313c7ac35a6e04488","lessThan":"7fee577a2fa78b9a76da015beec1ccf978746ebb","status":"affected","versionType":"git"},{"version":"4bf97069239bcfca9840936313c7ac35a6e04488","lessThan":"298510bbc7c3017c0faf481c6ea66f1065b657b4","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99017","source_modified_at":"2026-10-24T14:10:04.808Z","fetched_at":"2026-10-24T14:26:37.433577Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.14","status":"affected"},{"version":"0","lessThan":"6.14","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99017","source_modified_at":"2026-10-24T14:10:04.808Z","fetched_at":"2026-10-24T14:26:37.433577Z","package":{"name":"Linux","ecosystem":null},"version":"7fee577a2fa78b9a76da015beec1ccf978746ebb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99017","source_modified_at":"2026-10-24T14:10:04.808Z","fetched_at":"2026-10-24T14:26:37.433577Z","package":{"name":"Linux","ecosystem":null},"version":"298510bbc7c3017c0faf481c6ea66f1065b657b4","basis":"first unaffected version stated in the CVE record"}],"cvss":7,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:20:53.518Z","modified_at":"2026-10-24T14:10:04.808Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99017","fetched_at":"2026-10-24T14:26:37.433577Z","source_modified_at":"2026-10-24T14:10:04.808Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/fa465a7819ecbe5801b78c088d3cadaf2664b8ca"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7fee577a2fa78b9a76da015beec1ccf978746ebb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/298510bbc7c3017c0faf481c6ea66f1065b657b4"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-24T14:10:04.808Z","content_hash":"deb51899483401d31155233870a9591c6c5334e336d435703b3f9371c2ba0310"}}