256 lines
13 KiB
JSON
256 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-2026-80684",
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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": "2026-08-26T14:34:25.784Z",
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"datePublished": "2026-08-28T06:52:50.703Z",
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"dateUpdated": "2026-10-16T19:26:33.268Z"
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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": "2026-08-29T06:22:11.509Z"
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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 NULL dereference on AIBV allocation failure\n\nThe airq_iv_create() can return NULL on failure, but the return value was\nnever checked. If it fails, zdev->aibv will be NULL and fail when\ndereferenced in kvm_zpci_set_airq(). Add a NULL check and free the\npreviously allocated AISB bit and zdev->aisb on failure."
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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 bug is reached through the KVM_S390_ZPCI_OP VM ioctl (kvm_arch_vm_ioctl -> kvm_s390_pci_zpci_op -> kvm_s390_pci_aif_enable), a local syscall on the s390 hypervisor host, not via any network-facing kernel service.\nAC:L - An attacker can reliably trigger airq_iv_create() failure and the subsequent NULL dereference by issuing KVM_S390_ZPCIOP_REG_AEN under controlled host memory pressure or repeated registration attempts while holding a valid passthrough zPCI device context.\nPR:N - A malicious KVM guest with an assigned VFIO zPCI passthrough device can cause QEMU to issue KVM_S390_ZPCIOP_REG_AEN during normal adapter-event setup without possessing any host-root or init-namespace administrative credentials.\nUI:N - Exploitation requires no action by a separate victim user; triggering occurs through the attacker's own guest workload or VMM issuing the REG_AEN ioctl during standard zPCI passthrough interrupt-forwarding registration.\nS:C - The vulnerable KVM host code executes on behalf of a guest's passthrough device setup, and the resulting host kernel crash or corrupted global AIFT/GAIT interrupt-forwarding state impacts the hypervisor and resources outside the attacking guest's security boundary.\nC:H - Before the NULL dereference, unchecked allocation failure still populates host GAIT/summary-bit tables with attacker-influenced interrupt-routing fields, enabling misdelivery or exposure of adapter events intended for other guests or host contexts.\nI:H - Failed AIBV allocation leaves partially written host kernel interrupt-forwarding metadata (GAIT entries, kzdev pointers, summary-bit assignments) under attacker-controlled ioctl parameters, constituting exploitable kernel memory corruption prior to the crash.\nA:H - When zdev->aibv is NULL, kvm_zpci_set_airq() dereferences zdev->aibv->vector and airq_iv_end(zdev->aibv), causing a host kernel oops/panic that denies availability to all VMs on the system."
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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/pci.c"
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],
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"versions": [
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{
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"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "96099486b63985801c9c6ef22505e9aa635b2d20",
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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": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "0a95abe964400771ad82b027d7b84a0d183cd0db",
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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": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "df947d85e164a50a29d43a96e814f69ab1d0f7ed",
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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": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "e137d082325bbcae780087b57501d38585e625d9",
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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": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "d1a103dc9016c25e7423ce5841a5cc2df76d59f3",
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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": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
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"lessThan": "8bf09b9b7d3232806df95f409581f8a9fd99a3fa",
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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/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": "6.1.183",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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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": "6.0",
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"versionEndExcluding": "6.1.183"
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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": "6.6.151"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.12.103"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.18.44"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "7.1.8"
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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": "7.2"
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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/96099486b63985801c9c6ef22505e9aa635b2d20"
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},
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{
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"url": "https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db"
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},
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{
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"url": "https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed"
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},
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{
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"url": "https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9"
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},
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{
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"url": "https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3"
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},
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{
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"url": "https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa"
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}
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],
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"title": "KVM: s390: pci: Fix NULL dereference on AIBV allocation failure",
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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-2026-80684",
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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": "2026-10-16T19:19:58.006717Z"
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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": "2026-10-16T19:26:33.268Z"
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}
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}
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]
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}
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} |