CVE-2021-47407

{"id": "CVE-2021-47407", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47407", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:38:00.602784Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "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": "0eb05bf290cfe8610d9680b49abef37febd1c38a", "lessThan": "deb2949417677649e2413266d7ce8c2ff73952b4", "versionType": "git"}, {"status": "affected", "version": "0eb05bf290cfe8610d9680b49abef37febd1c38a", "lessThan": "4664318f73e496cd22c71b10888e75434a123e23", "versionType": "git"}, {"status": "affected", "version": "0eb05bf290cfe8610d9680b49abef37febd1c38a", "lessThan": "eb7511bf9182292ef1df1082d23039e856d1ddfb", "versionType": "git"}], "programFiles": ["arch/x86/include/asm/kvm_page_track.h", "arch/x86/kvm/mmu/page_track.c", "arch/x86/kvm/x86.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"status": "unaffected", "version": "0", "lessThan": "4.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.71", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.14.10", "versionType": "semver", "lessThanOrEqual": "5.14.*"}, {"status": "unaffected", "version": "5.15", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/x86/include/asm/kvm_page_track.h", "arch/x86/kvm/mmu/page_track.c", "arch/x86/kvm/x86.c"], "defaultStatus": "affected"}]}], "published": "2024-05-21T15:15:26.247", "references": [{"url": "https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb", "tags": ["Mailing List", "Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4664318f73e496cd22c71b10888e75434a123e23", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/deb2949417677649e2413266d7ce8c2ff73952b4", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/eb7511bf9182292ef1df1082d23039e856d1ddfb", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Handle SRCU initialization failure during page track init\n\nCheck the return of init_srcu_struct(), which can fail due to OOM, when\ninitializing the page track mechanism. Lack of checking leads to a NULL\npointer deref found by a modified syzkaller.\n\n[Move the call towards the beginning of kvm_arch_init_vm. - Paolo]"}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: x86: Manejar el error de inicializaci\u00f3n de SRCU durante el inicio del seguimiento de la p\u00e1gina. Verifique el retorno de init_srcu_struct(), que puede fallar debido a OOM, al inicializar el mecanismo de seguimiento de la p\u00e1gina. La falta de verificaci\u00f3n conduce a un puntero NULL deref encontrado por un syzkaller modificado. [Mueva la llamada hacia el principio de kvm_arch_init_vm. -Paolo]"}], "lastModified": "2026-06-17T04:17:24.180", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7A97507B-D1C6-49E3-9F7E-BFCDE3EA3905", "versionEndExcluding": "5.10.71"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A437B0D-8305-4C72-B691-D26986A126CF", "versionEndExcluding": "5.14.10", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}