142 lines
6.9 KiB
JSON
142 lines
6.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-46147",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-05-13T15:03:33.101Z",
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"datePublished": "2026-05-28T09:36:03.892Z",
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"dateUpdated": "2026-06-14T17:58:03.230Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-06-14T17:58:03.230Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/kvm/hyp/nvhe/pkvm.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "7d3c27b54253cda91dc4d2c1bfc109c490837ab9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "6d69c0ed978f7f0efd053fc98390f25ab77c1aea",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "73b9c1e5da84cd69b1a86e374e450817cd051371",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0",
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"lessThan": "6.18.30",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "0",
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"lessThan": "7.0.7",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/arm64/kvm/hyp/nvhe/pkvm.c"
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],
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"versions": [
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{
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"version": "6.18.30",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.7",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.18.30"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "7.0.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "7.1"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7d3c27b54253cda91dc4d2c1bfc109c490837ab9"
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},
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{
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"url": "https://git.kernel.org/stable/c/6d69c0ed978f7f0efd053fc98390f25ab77c1aea"
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},
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{
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"url": "https://git.kernel.org/stable/c/73b9c1e5da84cd69b1a86e374e450817cd051371"
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}
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],
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"title": "KVM: arm64: Fix pin leak and publication ordering in __pkvm_init_vcpu()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |