{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72143", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.908Z", "datePublished": "2026-08-15T05:53:16.241Z", "dateUpdated": "2026-10-16T18:44:58.966Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:40:51.234Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Restore SST-PP control to all domains\n\nThe SST-PP control offset is only restored to power domain 0 after\nresume. During suspend, control values are read and stored for all\npower domains.\n\nUse pd_info->sst_base instead of power_domain_info->sst_base, which\nonly points to power domain 0 base address." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flawed writeq runs only in the ISST TPMI driver PM resume callback (intel_sst_resume -> tpmi_sst_dev_resume) after a local suspend-to-RAM cycle, not from any network packet handler or remote service.\nAC:L - Once a multi-domain SST-TPMI system completes S3 suspend, resume deterministically executes the wrong MMIO restore for every power domain above zero with no races or attacker-dependent timing.\nPR:L - Reaching the buggy resume handler requires only initiating a system suspend (e.g., writing mem to /sys/power/state, which lacks a CAP_SYS_ADMIN check, or polkit-permitted local suspend); user namespaces cannot grant ISST ioctl writes but can still allow this PM path.\nUI:N - Exploitation does not require a victim to open files, mount filesystems, or take any other interactive action beyond the attacker (or system policy) triggering suspend and automatic resume.\nS:U - Impact is confined to corrupting SST-PP hardware configuration and host stability on the same machine; it does not cross a VM, container, or IOMMU security boundary to another authority.\nC:N - The bug performs MMIO writeq operations to hardware registers only; it does not read kernel memory, leak pointers, or expose data to userspace.\nI:H - Each incorrect resume writes a full 64-bit SST-PP control value to the wrong hardware MMIO address, corrupting platform power/performance configuration; values can be attacker-influenced via prior CAP_SYS_ADMIN ISST perf-level changes before suspend.\nA:H - Misdirected MMIO writes can panic or hang the host, and unrestored or corrupted SST-PP settings on additional power domains can destabilize multi-die Xeon systems after every affected resume cycle." } ] } ], "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": "e3704ce5d7156ee837461be99841f312c64700b0", "lessThan": "cea03d67db3a880893360bdbb1b0b8d9b33b1799", "status": "affected", "versionType": "git" }, { "version": "dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8", "lessThan": "2a42f651cce91e9cbe65fe933622c522cbb1868b", "status": "affected", "versionType": "git" }, { "version": "dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8", "lessThan": "2565a28cdcdcb035e151d285efcba26bccb3726e", "status": "affected", "versionType": "git" }, { "version": "2624f3bf45a830cb3b8c8b967b23a72139700562", "status": "affected", "versionType": "git" }, { "version": "6.18.16", "lessThan": "6.18.40", "status": "affected", "versionType": "semver" }, { "version": "6.19.6", "lessThan": "6.20", "status": "affected", "versionType": "semver" } ] }, { "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": "7.0", "status": "affected" }, { "version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "6.18.16", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cea03d67db3a880893360bdbb1b0b8d9b33b1799" }, { "url": "https://git.kernel.org/stable/c/2a42f651cce91e9cbe65fe933622c522cbb1868b" }, { "url": "https://git.kernel.org/stable/c/2565a28cdcdcb035e151d285efcba26bccb3726e" } ], "title": "platform/x86: ISST: Restore SST-PP control to all domains", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-72143", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-16T18:42:49.460532Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:44:58.966Z" } } ] } }