CVE-2026-90120

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90120", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.787Z", "datePublished": "2026-09-17T16:06:24.607Z", "dateUpdated": "2026-10-19T08:58:18.680Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:58:18.680Z"}, "descriptions": [{"lang": "en", "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/irqchip/irq-gic-v5-irs.c"], "versions": [{"version": "35866efa52feaf48cc54a0745851a555654e1446", "lessThan": "6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69", "status": "affected", "versionType": "git"}, {"version": "35866efa52feaf48cc54a0745851a555654e1446", "lessThan": "328affc639ce9873a7a0a3fd6b8339f19767529b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/irqchip/irq-gic-v5-irs.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69"}, {"url": "https://git.kernel.org/stable/c/328affc639ce9873a7a0a3fd6b8339f19767529b"}], "title": "irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/irqchip/irq-gic-v5-irs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69", "status": "affected", "version": "35866efa52feaf48cc54a0745851a555654e1446", "versionType": "git"}, {"lessThan": "328affc639ce9873a7a0a3fd6b8339f19767529b", "status": "affected", "version": "35866efa52feaf48cc54a0745851a555654e1446", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/irqchip/irq-gic-v5-irs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-90120", "lastModified": "2026-10-19T09:19:01.517", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:04.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/328affc639ce9873a7a0a3fd6b8339f19767529b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[35866efa52feaf48cc54a0745851a555654e1446,6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[35866efa52feaf48cc54a0745851a555654e1446,328affc639ce9873a7a0a3fd6b8339f19767529b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T17:00:12.831359+00:00", "updated": "2026-09-20T03:00:11.250905+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-787"]}