138 lines
7.0 KiB
JSON
138 lines
7.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-72291",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-09T03:40:39.917Z",
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"datePublished": "2026-08-15T05:55:12.597Z",
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"dateUpdated": "2026-08-17T05:42:25.857Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T05:42:25.857Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 9.3,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/s390/mm/gmap_helpers.c"
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],
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"versions": [
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{
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"version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4",
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"lessThan": "ce587046baacdeb774b7756ab29b3f594e429004",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "89fa757931dc0bcd64ef22b28d1d5ad00c5d02f4",
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"lessThan": "5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/s390/mm/gmap_helpers.c"
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],
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"versions": [
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{
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"version": "7.1",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "7.1",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.1",
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"versionEndExcluding": "7.1.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.1",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ce587046baacdeb774b7756ab29b3f594e429004"
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},
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{
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"url": "https://git.kernel.org/stable/c/5670b7f927f8d98685f3f5873dbf9f8d7a5a63f3"
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}
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],
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"title": "KVM: s390: Fix unlikely race in try_get_locked_pte()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |