{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72294", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.917Z", "datePublished": "2026-08-15T05:55:14.553Z", "dateUpdated": "2026-08-17T05:42:26.951Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:26.951Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()\n\nFunction kvm_vcpu_ioctl_interrupt() can be called from userspace, here\nadd irq validility cheking in kvm_vcpu_ioctl_interrupt()." } ], "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 flaw is reached only through local KVM ioctls on /dev/kvm (KVM_CREATE_VM, KVM_CREATE_VCPU, KVM_INTERRUPT on the vCPU fd); kvm_arch_vcpu_unlocked_ioctl() passes attacker-controlled irq values into kvm_vcpu_ioctl_interrupt() with no network, adjacent, or physical entry path.\nAC:L - One KVM_INTERRUPT ioctl with irq >= 15 or irq=0x80000000 deterministically calls kvm_queue_irq()/kvm_dequeue_irq(), which invoke set_bit()/clear_bit() far past the 15-bit irq_pending/irq_clear fields; no race, timing window, or attacker-uncontrollable memory layout is required.\nPR:L - Exploitation needs only permission to open /dev/kvm and manage a VM/vCPU (commonly kvm group membership or CAP_SYS_ADMIN obtainable inside a user namespace); it does not require init-namespace root or capabilities unavailable to an unprivileged local tenant.\nUI:N - No victim or operator interaction beyond the attacker's own KVM setup is required; once /dev/kvm access exists, a single malicious KVM_INTERRUPT ioctl on a controlled vCPU fd triggers the out-of-bounds bit manipulation.\nS:C - A KVM VM operator can corrupt host kernel memory in kvm_vcpu_arch from the KVM userspace interface, crossing the guest/VM-to-host virtualization boundary rather than confining impact to the attacker's own VM security scope.\nC:H - Unvalidated irq indices make set_bit()/clear_bit() operate many words beyond irq_pending/irq_clear, corrupting adjacent host vcpu->arch fields and potentially neighboring slab objects; per kernel guidance this out-of-bounds memory corruption is leverageable for host kernel information disclosure.\nI:H - The attacker fully controls the bit index via the irq argument, yielding controlled out-of-bounds set_bit()/clear_bit() writes across the vCPU kmem_cache allocation that can be steered toward host kernel privilege escalation or code execution.\nA:H - Corrupting irq_pending-adjacent kvm_vcpu_arch state or memory beyond the vCPU object can immediately oops or panic the host kernel when the vCPU runs or on subsequent KVM operations, constituting high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/loongarch/kvm/vcpu.c" ], "versions": [ { "version": "f45ad5b8aa9335bc6b30331b739e778f2f730b35", "lessThan": "15469ba0284c7cc01c38493391e9e73b918833c4", "status": "affected", "versionType": "git" }, { "version": "f45ad5b8aa9335bc6b30331b739e778f2f730b35", "lessThan": "efe27b19a15c384cad7c80de399f3107ab070e6d", "status": "affected", "versionType": "git" }, { "version": "f45ad5b8aa9335bc6b30331b739e778f2f730b35", "lessThan": "d4574547e04a47ad498149576f65b84475ea6f4c", "status": "affected", "versionType": "git" }, { "version": "f45ad5b8aa9335bc6b30331b739e778f2f730b35", "lessThan": "09b318ab77b7a4fc9987fd98d1525fc55ddc2617", "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/vcpu.c" ], "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "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": "6.7", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/15469ba0284c7cc01c38493391e9e73b918833c4" }, { "url": "https://git.kernel.org/stable/c/efe27b19a15c384cad7c80de399f3107ab070e6d" }, { "url": "https://git.kernel.org/stable/c/d4574547e04a47ad498149576f65b84475ea6f4c" }, { "url": "https://git.kernel.org/stable/c/09b318ab77b7a4fc9987fd98d1525fc55ddc2617" } ], "title": "LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()", "x_generator": { "engine": "bippy-1.2.0" } } } }