270 lines
13 KiB
JSON
270 lines
13 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-2026-52968",
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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": "2026-06-09T07:44:35.375Z",
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"datePublished": "2026-06-24T16:28:47.438Z",
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"dateUpdated": "2026-10-19T19:47:10.859Z"
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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": "2026-08-05T12:32:12.815Z"
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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: pci: fix GAIT table indexing due to double-scaling pointer arithmetic\n\nkvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and\naen_host_forward() index the GAIT by manually multiplying the index\nwith sizeof(struct zpci_gaite).\n\nSince aift->gait is already a struct zpci_gaite pointer, this\ndouble-scales the offset, accessing element aisb*16 instead of aisb.\n\nThis causes out-of-bounds accesses when aisb >= 32 (with\nZPCI_NR_DEVICES=512)\n\nFix by removing the erroneous sizeof multiplication."
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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:L/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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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 vulnerable code is reached through local KVM/VFIO s390 zPCI management paths, specifically the `KVM_S390_ZPCI_OP` VM ioctl and host interrupt forwarding, not through network packets.\nAC:L - Once zPCI AEN interpretation is available and an AISB index of 32 or higher is allocated, the bad pointer arithmetic deterministically accesses the wrong GAIT entry; no attacker-uncontrolled race is required.\nPR:L - The attacker needs local ability to operate a KVM VM with an associated VFIO zPCI device or equivalent VM-management access, but the vulnerable ioctl itself does not require a real init-namespace root capability check.\nUI:N - After the attacker can issue the relevant KVM/VFIO operations or trigger adapter events for the assigned device, exploitation does not require a separate victim user action.\nS:C - This is KVM host-side memory corruption in a virtualization/device-assignment path, so a plausible exploit crosses the VM or assigned-device security boundary into host kernel resources.\nC:H - The bug performs out-of-bounds reads from page-allocator memory through the misindexed GAIT entry and can expose host kernel memory contents or pointers.\nI:H - The registration and deregistration paths perform out-of-bounds writes to fields including `gisa`, `gisc`, `count`, `aisbo`, and `aisb`, making host kernel memory corruption and potential code execution defensible.\nA:H - The same out-of-bounds reads and writes can corrupt arbitrary adjacent kernel memory or dereference corrupted physical addresses, making host crash or panic a high-probability impact."
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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/kvm/interrupt.c",
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"arch/s390/kvm/pci.c"
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],
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"versions": [
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{
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"version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "31a9d9f9942885aae356a1a57c79e82c5b5b0828",
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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": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "a99a25db131ece5e6c0f7632da606de631efe4f2",
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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": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "11b8ff5b930b351dd1f6f088dce0beb027ac92d0",
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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": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "b22a2da8792a7bfe743c1a922e77fa499ddedbe8",
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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": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "e7216651b94e92e5433fb2f54b77864642b4ea48",
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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": "73f91b004321f2510fa79e66035dbbf1870fcf56",
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"lessThan": "16d990a15491cf76cd6eef0846e1b4100e63261a",
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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/kvm/interrupt.c",
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"arch/s390/kvm/pci.c"
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],
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"versions": [
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{
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"version": "6.0",
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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": "6.0",
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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": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.141",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.91",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.33",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.10",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "6.0",
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"versionEndExcluding": "6.1.175"
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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": "6.0",
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"versionEndExcluding": "6.6.141"
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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": "6.0",
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"versionEndExcluding": "6.12.91"
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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": "6.0",
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"versionEndExcluding": "6.18.33"
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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": "6.0",
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"versionEndExcluding": "7.0.10"
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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": "6.0",
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"versionEndExcluding": "7.1"
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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/31a9d9f9942885aae356a1a57c79e82c5b5b0828"
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},
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{
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"url": "https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2"
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},
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{
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"url": "https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0"
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},
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{
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"url": "https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8"
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},
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{
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"url": "https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48"
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},
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{
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"url": "https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a"
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}
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],
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"title": "KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-52968",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:23:40.668025Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:47:10.859Z"
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}
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}
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]
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}
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} |