{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/kvm_nested.h",
            "arch/arm64/kvm/at.c",
            "arch/arm64/kvm/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4ead4def04659739c399bfcb063f8a906194c79f",
              "status": "affected",
              "version": "2a359e072596fcb2e9e85017a865e3618a2fe5b5",
              "versionType": "git"
            },
            {
              "lessThan": "53804b6839573c9c6fff5f4cf075d6746267345e",
              "status": "affected",
              "version": "2a359e072596fcb2e9e85017a865e3618a2fe5b5",
              "versionType": "git"
            },
            {
              "lessThan": "9f3e83345a56280efffe235c65593c7e544c0fcc",
              "status": "affected",
              "version": "2a359e072596fcb2e9e85017a865e3618a2fe5b5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/kvm_nested.h",
            "arch/arm64/kvm/at.c",
            "arch/arm64/kvm/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Inject SEA if kvm_translate_vncr() can\u0027t resolve PFN\n\nkvm_handle_vncr_abort() assumes that s1_walk_result conveys an abort\nwhen kvm_translate_vncr() returns -EFAULT. This is not always the case\nas it\u0027s possible to encounter \u0027late\u0027 failures on the output of S1\ntranslation, e.g. a GFN outside of the memslots.\n\nFix it by preparing an external abort before returning from\nkvm_translate_vncr(). Get rid of the BUG_ON() in the fault injection\npath while at it."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only when an arm64 nested-KVM L1 hypervisor triggers VNCR_EL2 data aborts (ESR_ELx_EC_DABT_CUR with ESR_ELx_VNCR) during KVM_RUN via kvm_handle_vncr_abort(); no network, adjacent-radio, or physical-device path reaches this code.\nAC:L - An attacker controlling an L1 nested-hypervisor VM can reliably set VNCR_EL2 and guest EL2 page tables so stage-1 translation succeeds but the resulting GFN is outside host memslots or PFN resolution fails, deterministically hitting the faulty -EFAULT path; nested virt on arm64 cloud hosts is an attacker-selectable deployment.\nPR:N - Exploitation requires no host root or init-namespace capabilities beyond running hypervisor code in a tenant KVM guest on an arm64 host with nested virtualization enabled; the attacker operates entirely from within their assigned VM, consistent with other arm64 KVM nested-virt CVE scoring.\nUI:N - No victim user or administrator action is required beyond the attacker operating their own nested-virtualization workload; VNCR faults, page-table configuration, and repeated translation triggers are fully attacker-driven from within the guest.\nS:C - A malicious nested guest forces host KVM into BUG_ON(!vt-\u003ewr.failed) during VNCR abort handling, crashing the physical host kernel and denying service to all co-resident VMs, crossing the guest-to-hypervisor security boundary beyond the guest\u0027s intended authority.\nC:N - The vulnerability triggers a host kernel BUG_ON panic on a late translation failure without setting s1_walk_result.failed; there is no out-of-bounds read, use-after-free, or other information-disclosure primitive\u2014only an incorrect assumption leading to host crash.\nI:N - Impact is limited to host kernel panic via BUG_ON on the fault-injection path; no guest or host data is modified, no arbitrary write primitive exists, and the fix only prepares an external abort for reinjection to the nested guest.\nA:H - BUG_ON(!vt-\u003ewr.failed) on the late -EFAULT path causes an uncontained host kernel panic on production kernels (CONFIG_BUG=y), crashing the hypervisor and denying availability to every workload on the affected physical machine; the attacker can retrigger after reboot."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:53.024Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4ead4def04659739c399bfcb063f8a906194c79f"
        },
        {
          "url": "https://git.kernel.org/stable/c/53804b6839573c9c6fff5f4cf075d6746267345e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f3e83345a56280efffe235c65593c7e544c0fcc"
        }
      ],
      "title": "KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can\u0027t resolve PFN",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80665",
    "datePublished": "2026-08-28T06:49:08.085Z",
    "dateReserved": "2026-08-26T14:34:25.781Z",
    "dateUpdated": "2026-08-29T06:21:53.024Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}