159 lines
8.2 KiB
JSON
159 lines
8.2 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-2026-31569",
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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": "2026-03-09T15:48:24.117Z",
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"datePublished": "2026-04-24T14:35:48.768Z",
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"dateUpdated": "2026-08-05T12:23:33.914Z"
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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": "2026-08-05T12:23:33.914Z"
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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\nLoongArch: KVM: Handle the case that EIOINTC's coremap is empty\n\nEIOINTC's coremap in eiointc_update_sw_coremap() can be empty, currently\nwe get a cpuid with -1 in this case, but we actually need 0 because it's\nsimilar as the case that cpuid >= 4.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]."
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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:L/I:N/A:H",
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"baseScore": 7.3,
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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 LoongArch KVM EIOINTC path is reached through local KVM ioctls or by running guest code that causes IOCSR writes on the same host, not by network packets.\nAC:L - An attacker who can create/control a LoongArch KVM VM can supply an empty EIOINTC coremap deterministically; no race or external timing condition is required.\nPR:L - The path requires access to KVM VM/device/vCPU interfaces or control of a guest VM, which is a low-privileged local/tenant capability rather than host administrator privilege.\nUI:N - Once the attacker controls the VM/VMM inputs, triggering the bad coremap update does not require any separate victim action.\nS:C - The bug is in host KVM emulation and can be triggered from the guest/VMM boundary, so a guest or local KVM tenant can affect the host kernel security scope.\nC:L - The flaw creates a bounded negative-index host kernel read adjacent to kvm_arch::phyid_map::phys_map; there is no direct bulk memory disclosure path, but host kernel memory is still accessed out of bounds.\nI:N - The investigated path does not provide a defensible arbitrary write or host data modification primitive; the direct effect is bad lookup/interrupt routing rather than host integrity compromise.\nA:H - The out-of-bounds access is reachable on demand and was observed as a kernel UBSAN warning; on hardened or panic-on-warn configurations, and potentially with unlucky adjacent data, this can crash or destabilize the host kernel."
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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/loongarch/kvm/intc/eiointc.c"
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],
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"versions": [
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{
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"version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
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"lessThan": "126053d0a685bf1f2e98db8966386f38b2336338",
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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": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
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"lessThan": "2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3",
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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": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
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"lessThan": "b97bd69eb0f67b5f961b304d28e9ba45e202d841",
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"status": "affected",
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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/loongarch/kvm/intc/eiointc.c"
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],
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"versions": [
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{
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"version": "6.13",
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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": "6.13",
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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": "6.18.21",
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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": "6.19.11",
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"lessThanOrEqual": "6.19.*",
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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",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.18.21"
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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": "6.13",
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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": "6.13",
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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/126053d0a685bf1f2e98db8966386f38b2336338"
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},
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{
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"url": "https://git.kernel.org/stable/c/2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3"
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},
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{
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"url": "https://git.kernel.org/stable/c/b97bd69eb0f67b5f961b304d28e9ba45e202d841"
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}
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],
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"title": "LoongArch: KVM: Handle the case that EIOINTC's coremap is empty",
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"x_generator": {
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