{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89439", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.703Z", "datePublished": "2026-09-11T19:43:08.745Z", "dateUpdated": "2026-10-21T12:47:27.422Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:47:27.422Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Add a NULL check for sst_inst[]\n\nTo be consistent with other places, add a NULL check for failed socket\nloading by checking isst_common.sst_inst[]."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "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"], "versions": [{"version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "lessThan": "f7c9370dd1d3cedb80c635528271cab1d0bcb103", "status": "affected", "versionType": "git"}, {"version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "lessThan": "49a95fe1f64f41c2e8959e525aefdb10f23b293e", "status": "affected", "versionType": "git"}, {"version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "lessThan": "c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa", "status": "affected", "versionType": "git"}, {"version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "lessThan": "ef7975af15126dd70ace519da7bb33f2848b9064", "status": "affected", "versionType": "git"}, {"version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "lessThan": "3de2776e9d7073765c10c2326c2bda5926811ea6", "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/intel/speed_select_if/isst_tpmi_core.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "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": "6.4", "versionEndExcluding": "6.6.160"}, {"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f7c9370dd1d3cedb80c635528271cab1d0bcb103"}, {"url": "https://git.kernel.org/stable/c/49a95fe1f64f41c2e8959e525aefdb10f23b293e"}, {"url": "https://git.kernel.org/stable/c/c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa"}, {"url": "https://git.kernel.org/stable/c/ef7975af15126dd70ace519da7bb33f2848b9064"}, {"url": "https://git.kernel.org/stable/c/3de2776e9d7073765c10c2326c2bda5926811ea6"}], "title": "platform/x86: ISST: Add a NULL check for sst_inst[]", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f7c9370dd1d3cedb80c635528271cab1d0bcb103", "status": "affected", "version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "versionType": "git"}, {"lessThan": "49a95fe1f64f41c2e8959e525aefdb10f23b293e", "status": "affected", "version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "versionType": "git"}, {"lessThan": "c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa", "status": "affected", "version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "versionType": "git"}, {"lessThan": "ef7975af15126dd70ace519da7bb33f2848b9064", "status": "affected", "version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "versionType": "git"}, {"lessThan": "3de2776e9d7073765c10c2326c2bda5926811ea6", "status": "affected", "version": "d805456c712f93ba8a012430f2a93bec133b6ff4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "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: ISST: Add a NULL check for sst_inst[]\n\nTo be consistent with other places, add a NULL check for failed socket\nloading by checking isst_common.sst_inst[]."}], "id": "CVE-2026-89439", "lastModified": "2026-10-21T13:20:04.870", "metrics": {}, "published": "2026-09-11T20:19:24.203", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3de2776e9d7073765c10c2326c2bda5926811ea6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/49a95fe1f64f41c2e8959e525aefdb10f23b293e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef7975af15126dd70ace519da7bb33f2848b9064"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7c9370dd1d3cedb80c635528271cab1d0bcb103"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: ISST NULL pointer dereference leading to system crash", "id": "2532216", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532216"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's Intel Speed Select Technology (ISST) driver. A missing NULL check for `isst_common.sst_inst[]` during failed socket loading could allow a local attacker to trigger a NULL pointer dereference. This vulnerability could lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-89439", "public_date": "2026-09-11T19:43:08Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89439\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89439\nhttps://git.kernel.org/stable/c/3de2776e9d7073765c10c2326c2bda5926811ea6\nhttps://git.kernel.org/stable/c/49a95fe1f64f41c2e8959e525aefdb10f23b293e\nhttps://git.kernel.org/stable/c/c280fcd53b938b70c7dee9ce1a66b32bd6e5ebaa\nhttps://git.kernel.org/stable/c/ef7975af15126dd70ace519da7bb33f2848b9064"], "threat_severity": "Moderate"}

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