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-2026-90120",
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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": "2026-09-11T19:38:34.787Z",
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"datePublished": "2026-09-17T16:06:24.607Z",
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"dateUpdated": "2026-10-19T08:58:18.680Z"
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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": "2026-10-19T08:58:18.680Z"
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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\nirqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing\n\nIn gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond\nto a logical cpu recognized by the kernel, resulting in the cpu variable\ninitialization to an error value.\n\nCurrently, the get_logical_index() return value is not checked for failure,\nwhich might result in out-of-bounds memory corruption while trying to\nindex a per_cpu variable array.\n\nAdd a check to evaluate get_logical_index() return value."
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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:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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 triggering bytes are MADT GICC arm_mpidr/iaffid/irs_id fields parsed by gic_acpi_parse_iaffid() from acpi_table_parse_madt() on the init_IRQ()->irqchip_init()->gic_acpi_init()->gicv5_irs_acpi_probe() boot path; they arrive from firmware, a hypervisor ACPI blob, or an initrd MADT override, not from a network protocol message.\nAC:L - A MADT GICC with ACPI_MADT_ENABLED set and an arm_mpidr that acpi_map_gic_cpu_interface() never installed (invalid MPIDR, or cpu_count >= NR_CPUS) makes get_logical_index() return -EINVAL every boot; per_cpu() then uses that error index with no race or attacker-uncontrollable layout.\nPR:N - gic_acpi_parse_iaffid() is an __init MADT walker with no capable() or uid check, invoked from irqchip_init() before userspace; a crafted MADT GICC is consumed automatically, so no Linux account or user-namespace capability is required.\nUI:N - arm64 init_IRQ() calls irqchip_init(), which probes the GICv5 IRS MADT entry and walks GICC subtables via gicv5_irs_acpi_init_affinity(); the OOB store happens on that boot parse with no mount, open, or other victim action.\nS:U - The stores go to per_cpu(cpu_iaffid, cpu) and per_cpu(per_cpu_irs_data, cpu) in the host GICv5 IRS affinity setup; this stays inside the kernel's authority and is not a KVM guest-to-host, IOMMU, or sandbox crossing.\nC:H - Using get_logical_index()'s -EINVAL as the cpu argument to per_cpu() is an out-of-bounds write of gicc->iaffid and a kmalloc'd gicv5_irs_chip_data pointer through __per_cpu_offset[]; that kernel memory corruption can be leveraged for information disclosure.\nI:H - gic_acpi_parse_iaffid() writes gicc->iaffid, valid=true, and current_irs_data via per_cpu(cpu_iaffid/per_cpu_irs_data, cpu) when cpu is -EINVAL, corrupting memory outside the per-cpu arrays with attacker-influenced MADT data and a kernel heap pointer.\nA:H - __per_cpu_offset[-EINVAL] plus the subsequent per_cpu stores during gicv5_irs_acpi_probe() can target unmapped or live kernel data and oops/panic in init_IRQ() while bringing up GICv5, which is a full kernel availability loss."
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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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"drivers/irqchip/irq-gic-v5-irs.c"
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],
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"versions": [
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{
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"version": "35866efa52feaf48cc54a0745851a555654e1446",
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"lessThan": "6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69",
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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": "35866efa52feaf48cc54a0745851a555654e1446",
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"lessThan": "328affc639ce9873a7a0a3fd6b8339f19767529b",
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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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"drivers/irqchip/irq-gic-v5-irs.c"
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],
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"versions": [
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{
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"version": "7.0",
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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": "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": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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"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": "7.0",
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"versionEndExcluding": "7.2.6"
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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": "7.0",
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"versionEndExcluding": "7.3"
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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/6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69"
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},
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{
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"url": "https://git.kernel.org/stable/c/328affc639ce9873a7a0a3fd6b8339f19767529b"
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}
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],
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"title": "irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing",
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"x_generator": {
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