138 lines
7.9 KiB
JSON
138 lines
7.9 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-2025-38367",
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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": "2025-04-16T04:51:24.008Z",
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"datePublished": "2025-07-25T12:47:41.965Z",
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"dateUpdated": "2026-08-05T12:01:24.525Z"
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},
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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": "2026-08-05T12:01:24.525Z"
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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: Avoid overflow with array index\n\nThe variable index is modified and reused as array index when modify\nregister EIOINTC_ENABLE. There will be array index overflow problem."
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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 only by a guest vCPU executing a privileged `iocsrwr*` instruction against the in-kernel EIOINTC at IOCSR 0x1400, trapped locally on the host via `kvm_emu_iocsr()` → `kvm_io_bus_write()`. The attacker must be executing code on the physical host inside a VM, not sending network traffic.\nAC:L - A single deterministic 2/4/8-byte IOCSR write to offset 0x200–0x21f reproduces the out-of-bounds indexing every time, with no race, no timing window, and no dependence on memory layout the attacker cannot influence. The attacker also pre-seeds the out-of-bounds source bytes by writing the adjacent COREMAP/COREISR registers first.\nPR:L - IOCSR instructions require PLV0, so the attacker needs kernel privilege inside the guest — which is exactly what an ordinary cloud/virtualization tenant already possesses in its own VM, and no privilege at all on the host. From the host security authority being attacked, this is a low-privileged, untrusted principal.\nUI:N - The guest triggers the flaw entirely on its own by executing one instruction; no host operator, VMM action, or victim interaction is needed.\nS:C - The vulnerable component is the host kernel's KVM EIOINTC emulation, while the attacker's authority is confined to the guest; a guest-initiated write causes out-of-bounds accesses in host kernel memory, crossing the guest→hypervisor security boundary.\nC:H - Guest input causes the host kernel to read up to ~192 bytes beyond the 32-byte `enable`/`isr` arrays, and those out-of-bounds host-memory values directly determine which interrupts are asserted/deasserted, giving the guest an observable oracle over host kernel memory it is not entitled to read.\nI:H - Values harvested out of bounds are fed into `eiointc_enable_irq()`/`eiointc_update_irq()`, which then modify host-maintained state — `coreisr` words, `sw_coreisr` bitmaps, and queued vCPU interrupt-pending bits — so attacker-influenced out-of-bounds data corrupts host kernel interrupt-controller state and forces arbitrary interrupt injection/withdrawal.\nA:H - The corrupted indexing drives `eiointc_update_irq()` for IRQs the guest could not otherwise reach, where `kvm_get_vcpu(s->kvm, s->sw_coremap[irq])` can return NULL and `kvm_vcpu_ioctl_interrupt()` dereferences it while `eiointc->lock` is held with interrupts disabled, producing a host kernel oops/hang; even short of that, spurious or permanently lost interrupt delivery wedges the VM."
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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": "2cc84c4b0d70d42e291862ecc848890d18e1004a",
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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": "080e8d2ecdfde588897aa8a87a8884061f4dbbbb",
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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/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": "6.15.5",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.15.5"
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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": "6.13",
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"versionEndExcluding": "6.16"
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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/2cc84c4b0d70d42e291862ecc848890d18e1004a"
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},
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{
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"url": "https://git.kernel.org/stable/c/080e8d2ecdfde588897aa8a87a8884061f4dbbbb"
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}
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],
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"title": "LoongArch: KVM: Avoid overflow with array index",
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