CVE-2026-72295

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72295", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.917Z", "datePublished": "2026-08-15T05:55:16.590Z", "dateUpdated": "2026-08-17T05:42:28.074Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:28.074Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Validate irqchip index in irqfd routing\n\nSashiko reported that the irqchip index is not validated for LoongArch.\nAdd validation and reject out-of-range irqchip indexes to avoid indexing\npast the routing table's chip array."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The out-of-bounds write is reached only via local KVM ioctls on /dev/kvm (KVM_CREATE_VM \u2192 KVM_SET_GSI_ROUTING with KVM_IRQ_ROUTING_IRQCHIP); no network, Bluetooth, or physical device path reaches kvm_set_routing_entry().\nAC:L - One KVM_SET_GSI_ROUTING call with irqchip>=KVM_NR_IRQCHIPS (valid pin/gsi) deterministically executes rt->chip[irqchip][pin]=gsi past the chip[] boundary; the attacker fully controls irqchip, pin, and gsi with no race or uncontrollable layout.\nPR:L - Exploitation requires only opening /dev/kvm and holding a VM fd (kvm group membership or CAP_SYS_ADMIN obtainable in a user namespace), matching unprivileged cloud tenants or QEMU service accounts\u2014not init-namespace root.\nUI:N - No victim interaction is needed beyond the attacker's own KVM setup; a single malicious KVM_SET_GSI_ROUTING ioctl on a VM they control triggers the corruption.\nS:C - A KVM VM operator corrupts host kernel heap memory in the per-VM irq routing table from the KVM userspace interface, crossing the VM-to-host virtualization boundary rather than confining impact to the attacker's VM scope.\nC:H - Unvalidated irqchip indexes cause out-of-bounds writes past chip[] into nr_rt_entries and map[] hlist metadata in a kmalloc'd routing table; per kernel guidance such heap corruption is leverageable for host kernel memory disclosure.\nI:H - The attacker controls both the OOB index (irqchip,pin) and written value (gsi), yielding targeted corruption of routing-table pointers/state that can be steered toward host privilege escalation or code execution.\nA:H - Corrupting nr_rt_entries or map[] entries breaks subsequent irqfd/GSI routing lookups and irq injection, causing host kernel oops/panic or persistent VM/host denial of service on LoongArch KVM hosts."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/kvm/irqfd.c"], "versions": [{"version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "lessThan": "199b570d7fca1aa70e596f10a6276997becffb6d", "status": "affected", "versionType": "git"}, {"version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "lessThan": "8b3e188d19e4ffe916780aeb7ddad9d6457b8bcc", "status": "affected", "versionType": "git"}, {"version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "lessThan": "3474037904c20ff915e3ebab0ab5c1e41bbe549e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/kvm/irqfd.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.13", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/199b570d7fca1aa70e596f10a6276997becffb6d"}, {"url": "https://git.kernel.org/stable/c/8b3e188d19e4ffe916780aeb7ddad9d6457b8bcc"}, {"url": "https://git.kernel.org/stable/c/3474037904c20ff915e3ebab0ab5c1e41bbe549e"}], "title": "LoongArch: KVM: Validate irqchip index in irqfd routing", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/loongarch/kvm/irqfd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "199b570d7fca1aa70e596f10a6276997becffb6d", "status": "affected", "version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "versionType": "git"}, {"lessThan": "8b3e188d19e4ffe916780aeb7ddad9d6457b8bcc", "status": "affected", "version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "versionType": "git"}, {"lessThan": "3474037904c20ff915e3ebab0ab5c1e41bbe549e", "status": "affected", "version": "1928254c5ccb7bdffd7f0334e1ce250e9ce4de94", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/loongarch/kvm/irqfd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nLoongArch: KVM: Validate irqchip index in irqfd routing\n\nSashiko reported that the irqchip index is not validated for LoongArch.\nAdd validation and reject out-of-range irqchip indexes to avoid indexing\npast the routing table's chip array."}], "id": "CVE-2026-72295", "lastModified": "2026-08-17T06:18:32.310", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:02.037", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/199b570d7fca1aa70e596f10a6276997becffb6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3474037904c20ff915e3ebab0ab5c1e41bbe549e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b3e188d19e4ffe916780aeb7ddad9d6457b8bcc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: LoongArch: KVM: Validate irqchip index in irqfd routing", "id": "2516519", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516519"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-823", "details": ["A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for LoongArch architecture. An unvalidated interrupt controller (irqchip) index in the irqfd routing mechanism could allow a local attacker to perform an out-of-bounds memory access. This could lead to a denial of service or potentially privilege escalation within the system."], "name": "CVE-2026-72295", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72295\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72295\nhttps://lore.kernel.org/linux-cve-announce/2026081501-CVE-2026-72295-4e85@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1928254c5ccb7bdffd7f0334e1ce250e9ce4de94,199b570d7fca1aa70e596f10a6276997becffb6d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1928254c5ccb7bdffd7f0334e1ce250e9ce4de94,8b3e188d19e4ffe916780aeb7ddad9d6457b8bcc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1928254c5ccb7bdffd7f0334e1ce250e9ce4de94,3474037904c20ff915e3ebab0ab5c1e41bbe549e)"}}], "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": "6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-08-15T10:45:06.978594+00:00", "updated": "2026-08-22T10:00:07.265380+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}