{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72291", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.917Z", "datePublished": "2026-08-15T05:55:12.597Z", "dateUpdated": "2026-08-17T05:42:25.857Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:25.857Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix unlikely race in try_get_locked_pte()\n\nFix an unlikely race in try_get_locked_pte(), which could have happened\nif puds or pmds get unmapped between the p?dp_get() and p?d_offset()\nfunctions."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.3, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is in KVM s390 host page-table walking triggered by local guest hypervisor intercepts (UVC, ESSA) and /dev/kvm ioctls, not by remote network packet handling.\nAC:L - An attacker can control both sides of the race using multiple vCPUs or threads to concurrently trigger KVM gmap unmap/PV operations while host backing mappings are torn down via slot changes or ballooning.\nPR:N - A malicious s390 KVM guest can reach the vulnerable paths through hypervisor instruction intercepts without requiring host administrator privileges or CAP_SYS_ADMIN on the hypervisor.\nUI:N - Exploitation requires only attacker-controlled guest execution and concurrent memory management activity, with no additional victim actions such as opening files or mounting filesystems.\nS:C - Corrupting host kernel page tables while servicing guest memory operations crosses the guest-host virtualization security boundary and enables VM escape-class impact on shared IBM Z KVM hosts.\nC:H - The race dereferences freed intermediate page-table pages and can yield attacker-influenced PTE pointers, enabling arbitrary kernel memory disclosure through subsequent PTE reads.\nI:H - Corrupted PTE pointers lead to atomic PTE bit updates and secure-page folio operations on attacker-chosen kernel memory, providing a plausible path to arbitrary write or code execution.\nA:H - Dereferencing freed or collapsed page-table structures or corrupting PTEs can cause kernel oops, panic, or repeated guest-triggered crashes denying host availability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/mm/gmap_helpers.c"], "versions": [{"version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4", "lessThan": "ce587046baacdeb774b7756ab29b3f594e429004", "status": "affected", "versionType": "git"}, {"version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4", "lessThan": "5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/mm/gmap_helpers.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "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": "7.1", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ce587046baacdeb774b7756ab29b3f594e429004"}, {"url": "https://git.kernel.org/stable/c/5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3"}], "title": "KVM: s390: Fix unlikely race in try_get_locked_pte()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/mm/gmap_helpers.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ce587046baacdeb774b7756ab29b3f594e429004", "status": "affected", "version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4", "versionType": "git"}, {"lessThan": "5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3", "status": "affected", "version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/mm/gmap_helpers.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nKVM: s390: Fix unlikely race in try_get_locked_pte()\n\nFix an unlikely race in try_get_locked_pte(), which could have happened\nif puds or pmds get unmapped between the p?dp_get() and p?d_offset()\nfunctions."}], "id": "CVE-2026-72291", "lastModified": "2026-08-17T06:18:31.917", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:01.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce587046baacdeb774b7756ab29b3f594e429004"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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