CVE-2026-46317

{"id": "CVE-2026-46317", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.0}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51", "lessThan": "918450ad6010df6ecd2efde12a1409e011da22d6", "versionType": "git"}, {"status": "affected", "version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51", "lessThan": "4424dbcb06d68e34e51c019a5781a7dc00731971", "versionType": "git"}, {"status": "affected", "version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51", "lessThan": "70543358fa08e0f7cebc3447c3b70fe97ad7aaa8", "versionType": "git"}], "programFiles": ["arch/arm64/kvm/nested.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/arm64/kvm/nested.c"], "defaultStatus": "affected"}]}], "published": "2026-06-09T13:16:37.000", "references": [{"url": "https://git.kernel.org/stable/c/4424dbcb06d68e34e51c019a5781a7dc00731971", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/70543358fa08e0f7cebc3447c3b70fe97ad7aaa8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/918450ad6010df6ecd2efde12a1409e011da22d6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Reassign nested_mmus array behind mmu_lock\n\nkvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the\nMMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which\ncan run at any time. kvm_vcpu_init_nested() reallocates the array and frees\nthe old buffer while holding only kvm->arch.config_lock, so such a walker\ncan reference the freed array.\n\nAllocate the new array outside of mmu_lock, as the allocation can sleep.\nUnder the lock, copy the existing entries, fix up the back pointers and\nreassign the array. Free the old buffer after dropping the lock, as\nkvfree() can sleep as well."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nKVM: arm64: Reasignar el array nested_mmus detr\u00e1s de mmu_lock\n\nkvm->arch.nested_mmus[] es recorrido bajo kvm->mmu_lock, incluyendo desde la ruta del notificador de MMU (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), que puede ejecutarse en cualquier momento. kvm_vcpu_init_nested() reasigna el array y libera el b\u00fafer antiguo mientras mantiene solo kvm->arch.config_lock, por lo que dicho recorredor puede referenciar el array liberado.\n\nAsignar el nuevo array fuera de mmu_lock, ya que la asignaci\u00f3n puede dormir. Bajo el bloqueo, copiar las entradas existentes, corregir los punteros inversos y reasignar el array. Liberar el b\u00fafer antiguo despu\u00e9s de soltar el bloqueo, ya que kvfree() tambi\u00e9n puede dormir."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CB828803-5FA4-4A1C-A77D-0A10A2BAFDC6", "versionEndExcluding": "6.18.35", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9161A938-0FA8-44BC-95FE-C5A271601AB3", "versionEndExcluding": "7.0.12", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B0E8FC71-3952-444C-83E9-718DBBBEC615"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}