{"id":"CVE-2026-72143","state":"PUBLISHED","title":"platform/x86: ISST: Restore SST-PP control to all domains","description":"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.","publishedAt":"2026-08-15T05:53:16.241Z","updatedAt":"2026-10-16T18:44:58.966Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e3704ce5d7156ee837461be99841f312c64700b0","status":"affected","lessThan":"cea03d67db3a880893360bdbb1b0b8d9b33b1799","versionType":"git"},{"version":"dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8","status":"affected","lessThan":"2a42f651cce91e9cbe65fe933622c522cbb1868b","versionType":"git"},{"version":"dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8","status":"affected","lessThan":"2565a28cdcdcb035e151d285efcba26bccb3726e","versionType":"git"},{"version":"2624f3bf45a830cb3b8c8b967b23a72139700562","status":"affected","versionType":"git"},{"version":"6.18.16","status":"affected","lessThan":"6.18.40","versionType":"semver"},{"version":"6.19.6","status":"affected","lessThan":"6.20","versionType":"semver"}],"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":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/cea03d67db3a880893360bdbb1b0b8d9b33b1799","https://git.kernel.org/stable/c/2a42f651cce91e9cbe65fe933622c522cbb1868b","https://git.kernel.org/stable/c/2565a28cdcdcb035e151d285efcba26bccb3726e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72143.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72143","state":"PUBLISHED","datePublished":"2026-08-15T05:53:16.241Z","dateUpdated":"2026-10-16T18:44:58.966Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.908Z"},"containers":{"cna":{"title":"platform/x86: ISST: Restore SST-PP control to all domains","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e3704ce5d7156ee837461be99841f312c64700b0","status":"affected","lessThan":"cea03d67db3a880893360bdbb1b0b8d9b33b1799","versionType":"git"},{"version":"dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8","status":"affected","lessThan":"2a42f651cce91e9cbe65fe933622c522cbb1868b","versionType":"git"},{"version":"dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8","status":"affected","lessThan":"2565a28cdcdcb035e151d285efcba26bccb3726e","versionType":"git"},{"version":"2624f3bf45a830cb3b8c8b967b23a72139700562","status":"affected","versionType":"git"},{"version":"6.18.16","status":"affected","lessThan":"6.18.40","versionType":"semver"},{"version":"6.19.6","status":"affected","lessThan":"6.20","versionType":"semver"}],"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":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/cea03d67db3a880893360bdbb1b0b8d9b33b1799"},{"url":"https://git.kernel.org/stable/c/2a42f651cce91e9cbe65fe933622c522cbb1868b"},{"url":"https://git.kernel.org/stable/c/2565a28cdcdcb035e151d285efcba26bccb3726e"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:40:51.234Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:44:58.966Z"}}]}}}