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CVE-2026-72294 (GCVE-0-2026-72294)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42
VLAI
Title
LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()
Summary
In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt() Function kvm_vcpu_ioctl_interrupt() can be called from userspace, here add irq validility cheking in kvm_vcpu_ioctl_interrupt().
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f45ad5b8aa9335bc6b30331b739e778f2f730b35 , < 15469ba0284c7cc01c38493391e9e73b918833c4 (git)
Affected: f45ad5b8aa9335bc6b30331b739e778f2f730b35 , < efe27b19a15c384cad7c80de399f3107ab070e6d (git)
Affected: f45ad5b8aa9335bc6b30331b739e778f2f730b35 , < d4574547e04a47ad498149576f65b84475ea6f4c (git)
Affected: f45ad5b8aa9335bc6b30331b739e778f2f730b35 , < 09b318ab77b7a4fc9987fd98d1525fc55ddc2617 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/vcpu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "f45ad5b8aa9335bc6b30331b739e778f2f730b35",
              "versionType": "git"
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              "versionType": "git"
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          "vendor": "Linux",
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              "status": "affected",
              "version": "6.7"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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 \u003e= 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\u0027s 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\u0027s 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-\u003earch 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:26.951Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72294",
    "datePublished": "2026-08-15T05:55:14.553Z",
    "dateReserved": "2026-08-09T03:40:39.917Z",
    "dateUpdated": "2026-08-17T05:42:26.951Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72294",
      "date": "2026-09-05",
      "epss": "0.00163",
      "percentile": "0.05822"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72294\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:22:01.783\",\"lastModified\":\"2026-08-17T06:18:32.193\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/loongarch/kvm/vcpu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f45ad5b8aa9335bc6b30331b739e778f2f730b35\",\"lessThan\":\"15469ba0284c7cc01c38493391e9e73b918833c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f45ad5b8aa9335bc6b30331b739e778f2f730b35\",\"lessThan\":\"efe27b19a15c384cad7c80de399f3107ab070e6d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f45ad5b8aa9335bc6b30331b739e778f2f730b35\",\"lessThan\":\"d4574547e04a47ad498149576f65b84475ea6f4c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f45ad5b8aa9335bc6b30331b739e778f2f730b35\",\"lessThan\":\"09b318ab77b7a4fc9987fd98d1525fc55ddc2617\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/loongarch/kvm/vcpu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.0,\"impactScore\":6.0}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09b318ab77b7a4fc9987fd98d1525fc55ddc2617\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/15469ba0284c7cc01c38493391e9e73b918833c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d4574547e04a47ad498149576f65b84475ea6f4c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/efe27b19a15c384cad7c80de399f3107ab070e6d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T15:52:41+00:00",
      "cve": "CVE-2026-72294",
      "id": "CVE-2026-72294",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: LoongArch: KVM: Check irq validity in kvm_vcpu_ioctl_interrupt()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72294.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.