{"id":"CVE-2026-89438","state":"PUBLISHED","title":"platform/x86: ISST: Validate logical CPU id and clos id","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate logical CPU id and clos id\n\nValidate max CLOS ID and logical CPU ID for core power feature.\nReject any clos level or logical CPU number greater than the\nsupported maximum. These are used to calculate MMIO offset.","publishedAt":"2026-09-11T19:43:08.077Z","updatedAt":"2026-10-19T08:46:46.711Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"0d601126c7afda9bb94dfecc8b2c0a16f20d76cb","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"c9ee2770eb95ba316a56d776b2b66666b70c194b","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"5b032e1dda486ca41d10536bd195bd8a559af1e2","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"82d4afadb02fb4d7d7bb9230900904c10e49ec87","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"124e2dbabe460c2a6e7440f4ad8af560131295c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"]}],"references":["https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb","https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b","https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2","https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87","https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89438.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89438","state":"PUBLISHED","datePublished":"2026-09-11T19:43:08.077Z","dateUpdated":"2026-10-19T08:46:46.711Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.703Z"},"containers":{"cna":{"title":"platform/x86: ISST: Validate logical CPU id and clos id","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Validate logical CPU id and clos id\n\nValidate max CLOS ID and logical CPU ID for core power feature.\nReject any clos level or logical CPU number greater than the\nsupported maximum. These are used to calculate MMIO offset."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"0d601126c7afda9bb94dfecc8b2c0a16f20d76cb","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"c9ee2770eb95ba316a56d776b2b66666b70c194b","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"5b032e1dda486ca41d10536bd195bd8a559af1e2","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"82d4afadb02fb4d7d7bb9230900904c10e49ec87","versionType":"git"},{"version":"12a7d2cb811dd8a884dea088a2701fcb8d00136e","status":"affected","lessThan":"124e2dbabe460c2a6e7440f4ad8af560131295c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb"},{"url":"https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b"},{"url":"https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2"},{"url":"https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87"},{"url":"https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:46:46.711Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}