{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47061", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-29T22:33:44.294Z", "datePublished": "2024-02-29T22:37:35.689Z", "dateUpdated": "2025-05-04T12:41:01.255Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T12:41:01.255Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU\n\nIf allocating a new instance of an I/O bus fails when unregistering a\ndevice, wait to destroy the device until after all readers are guaranteed\nto see the new null bus. Destroying devices before the bus is nullified\ncould lead to use-after-free since readers expect the devices on their\nreference of the bus to remain valid."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["virt/kvm/kvm_main.c"], "versions": [{"version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "03c6cccedd3913006744faa252a4da5145299343", "status": "affected", "versionType": "git"}, {"version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "4e899ca848636b37e9ac124bc1723862a7d7d927", "status": "affected", "versionType": "git"}, {"version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "30f46c6993731efb2a690c9197c0fd9ed425da2d", "status": "affected", "versionType": "git"}, {"version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "2ee3757424be7c1cd1d0bbfa6db29a7edd82a250", "status": "affected", "versionType": "git"}, {"version": "f0dfffce3f4ffd5f822568a4a6fb34c010e939d1", "status": "affected", "versionType": "git"}, {"version": "840e124f89a5127e7eb97ebf377f4b8ca745c070", "status": "affected", "versionType": "git"}, {"version": "40a023f681befd9b2862a3c16fb306a38b359ae5", "status": "affected", "versionType": "git"}, {"version": "19184bd06f488af62924ff1747614a8cb284ad63", "status": "affected", "versionType": "git"}, {"version": "41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d", "status": "affected", "versionType": "git"}, {"version": "68c125324b5e1d1d22805653735442923d896a1d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["virt/kvm/kvm_main.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.10.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.11.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.12.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.238"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.238"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.200"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.66"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343"}, {"url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927"}, {"url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d"}, {"url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250"}], "title": "KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.011Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-08-08T18:46:02.297393Z", "id": "CVE-2021-47061", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-08T18:46:13.135Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.011Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47061", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-08-08T18:46:02.297393Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-08T18:46:08.349Z"}}], "cna": {"title": "KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "03c6cccedd3913006744faa252a4da5145299343", "versionType": "git"}, {"status": "affected", "version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "4e899ca848636b37e9ac124bc1723862a7d7d927", "versionType": "git"}, {"status": "affected", "version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "30f46c6993731efb2a690c9197c0fd9ed425da2d", "versionType": "git"}, {"status": "affected", "version": "f65886606c2d3b562716de030706dfe1bea4ed5e", "lessThan": "2ee3757424be7c1cd1d0bbfa6db29a7edd82a250", "versionType": "git"}, {"status": "affected", "version": "f0dfffce3f4ffd5f822568a4a6fb34c010e939d1", "versionType": "git"}, {"status": "affected", "version": "840e124f89a5127e7eb97ebf377f4b8ca745c070", "versionType": "git"}, {"status": "affected", "version": "40a023f681befd9b2862a3c16fb306a38b359ae5", "versionType": "git"}, {"status": "affected", "version": "19184bd06f488af62924ff1747614a8cb284ad63", "versionType": "git"}, {"status": "affected", "version": "41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d", "versionType": "git"}, {"status": "affected", "version": "68c125324b5e1d1d22805653735442923d896a1d", "versionType": "git"}], "programFiles": ["virt/kvm/kvm_main.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"status": "unaffected", "version": "0", "lessThan": "5.9", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.37", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.21", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.4", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["virt/kvm/kvm_main.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343"}, {"url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927"}, {"url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d"}, {"url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU\n\nIf allocating a new instance of an I/O bus fails when unregistering a\ndevice, wait to destroy the device until after all readers are guaranteed\nto see the new null bus. Destroying devices before the bus is nullified\ncould lead to use-after-free since readers expect the devices on their\nreference of the bus to remain valid."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.37", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.11.21", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.4", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.4.238"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.238"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.200"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.148"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.66"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.8.10"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T12:41:01.255Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47061", "state": "PUBLISHED", "dateUpdated": "2025-05-04T12:41:01.255Z", "dateReserved": "2024-02-29T22:33:44.294Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-29T22:37:35.689Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BFD29FB7-96E7-40B2-A1A7-AFA8D43EC498", "versionEndExcluding": "5.10.37", "versionStartIncluding": "5.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0", "versionEndExcluding": "5.11.21", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838", "versionEndExcluding": "5.12.4", "versionStartIncluding": "5.12", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU\n\nIf allocating a new instance of an I/O bus fails when unregistering a\ndevice, wait to destroy the device until after all readers are guaranteed\nto see the new null bus. Destroying devices before the bus is nullified\ncould lead to use-after-free since readers expect the devices on their\nreference of the bus to remain valid."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: Destruye los dispositivos del bus de E/S al cancelar el registro _despu\u00e9s_ de sincronizar SRCU Si falla la asignaci\u00f3n de una nueva instancia de un bus de E/S al cancelar el registro de un dispositivo, espere para destruir el dispositivo hasta que todos los lectores tengan la garant\u00eda de ver el nuevo bus nulo. Destruir dispositivos antes de que se anule el bus podr\u00eda dar lugar a un uso posterior a la liberaci\u00f3n, ya que los lectores esperan que los dispositivos en su referencia del bus sigan siendo v\u00e1lidos."}], "id": "CVE-2021-47061", "lastModified": "2024-12-10T16:55:15.017", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-02-29T23:15:07.793", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: KVM: use-after-free while destroy I/O bus devices on unregister failure", "id": "2267173", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267173"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU\nIf allocating a new instance of an I/O bus fails when unregistering a\ndevice, wait to destroy the device until after all readers are guaranteed\nto see the new null bus. Destroying devices before the bus is nullified\ncould lead to use-after-free since readers expect the devices on their\nreference of the bus to remain valid.", "A flaw was found in the Linux kernel\u2019s Kernel-based virtual machine (KVM) subsystem. A bug in the code destroys devices attached to I/O buses before the bus can be nullified. This issue causes use-after-free scenarios as readers may still reference the devices on their bus version."], "name": "CVE-2021-47061", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47061\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47061\nhttps://lore.kernel.org/linux-cve-announce/2024022952-CVE-2021-47061-6fea@gregkh/T/#u"], "statement": "Red Hat Enterprise Linux 8 and 9 are not affected by this vulnerability.", "threat_severity": "Moderate"}

{}