{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81016", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.813Z", "datePublished": "2026-09-11T19:43:04.740Z", "dateUpdated": "2026-09-11T19:43:04.740Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:43:04.740Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86/amd/pmc: Propagate SMU errors and validate S2D address\n\namd_stb_s2d_init() discards the return value of several S2D SMU commands.\nWhen the SMU refuses a command (e.g. \"SMU cmd failed. err: 0xff\") the\nfailure is only noticed indirectly - if at all - and reported as -EIO,\nmasking the real error.\n\nMore seriously, the S2D_PHYS_ADDR_LOW/HIGH return values are ignored, so\non failure phys_addr_low/hi are left uninitialised and the assembled\naddress is passed straight to devm_ioremap(). When the SMU leaves them at\nzero this maps physical address 0 and trips the ioremap-on-RAM warning:\n\n amd_pmc AMDI000B:00: SMU cmd failed. err: 0xff\n ioremap on RAM at 0x0000000000000000 - 0x0000000000ffffff\n WARNING: CPU: 13 PID: 4592 at arch/x86/mm/ioremap.c:...\n\nCheck the return value of each SMU command and propagate it, and reject a\nzero physical address before calling devm_ioremap()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/x86/amd/pmc/mp1_stb.c"], "versions": [{"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "lessThan": "8178f59d76570b152d836bde07f5997f15861f04", "status": "affected", "versionType": "git"}, {"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "lessThan": "775d4cde1f9737796ce7d8393521e9e8c5b49891", "status": "affected", "versionType": "git"}, {"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "lessThan": "0225c1d637687b03726f00ac65b6def843d2c464", "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/amd/pmc/mp1_stb.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "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-rc1", "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": "5.18", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8178f59d76570b152d836bde07f5997f15861f04"}, {"url": "https://git.kernel.org/stable/c/775d4cde1f9737796ce7d8393521e9e8c5b49891"}, {"url": "https://git.kernel.org/stable/c/0225c1d637687b03726f00ac65b6def843d2c464"}], "title": "platform/x86/amd/pmc: Propagate SMU errors and validate S2D address", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/platform/x86/amd/pmc/mp1_stb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8178f59d76570b152d836bde07f5997f15861f04", "status": "affected", "version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "versionType": "git"}, {"lessThan": "775d4cde1f9737796ce7d8393521e9e8c5b49891", "status": "affected", "version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "versionType": "git"}, {"lessThan": "0225c1d637687b03726f00ac65b6def843d2c464", "status": "affected", "version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/platform/x86/amd/pmc/mp1_stb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "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-rc1", "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/amd/pmc: Propagate SMU errors and validate S2D address\n\namd_stb_s2d_init() discards the return value of several S2D SMU commands.\nWhen the SMU refuses a command (e.g. \"SMU cmd failed. err: 0xff\") the\nfailure is only noticed indirectly - if at all - and reported as -EIO,\nmasking the real error.\n\nMore seriously, the S2D_PHYS_ADDR_LOW/HIGH return values are ignored, so\non failure phys_addr_low/hi are left uninitialised and the assembled\naddress is passed straight to devm_ioremap(). When the SMU leaves them at\nzero this maps physical address 0 and trips the ioremap-on-RAM warning:\n\n amd_pmc AMDI000B:00: SMU cmd failed. err: 0xff\n ioremap on RAM at 0x0000000000000000 - 0x0000000000ffffff\n WARNING: CPU: 13 PID: 4592 at arch/x86/mm/ioremap.c:...\n\nCheck the return value of each SMU command and propagate it, and reject a\nzero physical address before calling devm_ioremap()."}], "id": "CVE-2026-81016", "lastModified": "2026-09-11T20:19:10.560", "metrics": {}, "published": "2026-09-11T20:19:10.560", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0225c1d637687b03726f00ac65b6def843d2c464"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/775d4cde1f9737796ce7d8393521e9e8c5b49891"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8178f59d76570b152d836bde07f5997f15861f04"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: AMD PMC vulnerability leads to system instability via improper address validation", "id": "2532049", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532049"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel. Specifically, within the AMD Platform Management Controller (PMC) component, the `amd_stb_s2d_init()` function does not properly validate memory addresses returned by System Management Unit (SMU) commands. This can result in the kernel attempting to map a critical memory region at address zero, leading to system warnings and potential instability. This issue could be exploited by a local attacker to cause a denial of service."], "name": "CVE-2026-81016", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:43:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81016\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81016\nhttps://git.kernel.org/stable/c/0225c1d637687b03726f00ac65b6def843d2c464\nhttps://git.kernel.org/stable/c/775d4cde1f9737796ce7d8393521e9e8c5b49891\nhttps://git.kernel.org/stable/c/8178f59d76570b152d836bde07f5997f15861f04"], "threat_severity": "Moderate"}

{}