{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46147", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.101Z", "datePublished": "2026-05-28T09:36:03.892Z", "dateUpdated": "2026-05-28T09:36:03.892Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-28T09:36:03.892Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Fix pin leak and publication ordering in __pkvm_init_vcpu()\n\nTwo bugs exist in the vCPU initialisation path:\n\n1. If a check fails after hyp_pin_shared_mem() succeeds, the cleanup\n path jumps to 'unlock' without calling unpin_host_vcpu() or\n unpin_host_sve_state(), permanently leaking pin references on the\n host vCPU and SVE state pages.\n\n Extract a register_hyp_vcpu() helper that performs the checks and\n the store. When register_hyp_vcpu() returns an error, call\n unpin_host_vcpu() and unpin_host_sve_state() inline before falling\n through to the existing 'unlock' label.\n\n2. register_hyp_vcpu() publishes the new vCPU pointer into\n 'hyp_vm->vcpus[]' with a bare store, allowing a concurrent caller\n of pkvm_load_hyp_vcpu() to observe a partially initialised vCPU\n object.\n\n Ensure the store uses smp_store_release() and the load uses\n smp_load_acquire(). While 'vm_table_lock' currently serialises the\n store and the load, these barriers ensure the reader sees the fully\n initialised 'hyp_vcpu' object even if there were a lockless path or\n if the lock's own ordering guarantees were insufficient for nested\n object initialization."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/hyp/nvhe/pkvm.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7d3c27b54253cda91dc4d2c1bfc109c490837ab9", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6d69c0ed978f7f0efd053fc98390f25ab77c1aea", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "73b9c1e5da84cd69b1a86e374e450817cd051371", "status": "affected", "versionType": "git"}, {"version": "0", "lessThan": "6.18.30", "status": "affected", "versionType": "semver"}, {"version": "0", "lessThan": "7.0.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/hyp/nvhe/pkvm.c"], "versions": [{"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.1-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7d3c27b54253cda91dc4d2c1bfc109c490837ab9"}, {"url": "https://git.kernel.org/stable/c/6d69c0ed978f7f0efd053fc98390f25ab77c1aea"}, {"url": "https://git.kernel.org/stable/c/73b9c1e5da84cd69b1a86e374e450817cd051371"}], "title": "KVM: arm64: Fix pin leak and publication ordering in __pkvm_init_vcpu()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Fix pin leak and publication ordering in __pkvm_init_vcpu()\n\nTwo bugs exist in the vCPU initialisation path:\n\n1. If a check fails after hyp_pin_shared_mem() succeeds, the cleanup\n path jumps to 'unlock' without calling unpin_host_vcpu() or\n unpin_host_sve_state(), permanently leaking pin references on the\n host vCPU and SVE state pages.\n\n Extract a register_hyp_vcpu() helper that performs the checks and\n the store. When register_hyp_vcpu() returns an error, call\n unpin_host_vcpu() and unpin_host_sve_state() inline before falling\n through to the existing 'unlock' label.\n\n2. register_hyp_vcpu() publishes the new vCPU pointer into\n 'hyp_vm->vcpus[]' with a bare store, allowing a concurrent caller\n of pkvm_load_hyp_vcpu() to observe a partially initialised vCPU\n object.\n\n Ensure the store uses smp_store_release() and the load uses\n smp_load_acquire(). While 'vm_table_lock' currently serialises the\n store and the load, these barriers ensure the reader sees the fully\n initialised 'hyp_vcpu' object even if there were a lockless path or\n if the lock's own ordering guarantees were insufficient for nested\n object initialization."}], "id": "CVE-2026-46147", "lastModified": "2026-05-28T10:16:30.320", "metrics": {}, "published": "2026-05-28T10:16:30.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d69c0ed978f7f0efd053fc98390f25ab77c1aea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/73b9c1e5da84cd69b1a86e374e450817cd051371"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d3c27b54253cda91dc4d2c1bfc109c490837ab9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}