CVE-2021-47217

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47217", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-04-10T18:59:19.528Z", "datePublished": "2024-04-10T19:01:56.419Z", "dateUpdated": "2026-05-11T13:50:14.845Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:50:14.845Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails\n\nCheck for a valid hv_vp_index array prior to derefencing hv_vp_index when\nsetting Hyper-V's TSC change callback. If Hyper-V setup failed in\nhyperv_init(), the kernel will still report that it's running under\nHyper-V, but will have silently disabled nearly all functionality.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP\n CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:set_hv_tscchange_cb+0x15/0xa0\n Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08\n ...\n Call Trace:\n kvm_arch_init+0x17c/0x280\n kvm_init+0x31/0x330\n vmx_init+0xba/0x13a\n do_one_initcall+0x41/0x1c0\n kernel_init_freeable+0x1f2/0x23b\n kernel_init+0x16/0x120\n ret_from_fork+0x22/0x30"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/hyperv/hv_init.c"], "versions": [{"version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "b20ec58f8a6f4fef32cc71480ddf824584e24743", "status": "affected", "versionType": "git"}, {"version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "b0e44dfb4e4c699cca33ede431b8d127e6e8d661", "status": "affected", "versionType": "git"}, {"version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "9c177eee116cf888276d3748cb176e72562cfd5c", "status": "affected", "versionType": "git"}, {"version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "8823ea27fff6084bbb4bc71d15378fae0220b1d8", "status": "affected", "versionType": "git"}, {"version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "daf972118c517b91f74ff1731417feb4270625a4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/hyperv/hv_init.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.218", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.162", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.82", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "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": "4.16", "versionEndExcluding": "4.19.218"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.4.162"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.10.82"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743"}, {"url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661"}, {"url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c"}, {"url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8"}, {"url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4"}], "title": "x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-17T18:03:45.646426Z", "id": "CVE-2021-47217", "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": "2024-06-17T18:04:39.738Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.432Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.432Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47217", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-06-17T18:03:45.646426Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-17T18:03:46.614Z"}}], "cna": {"title": "x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "b20ec58f8a6f4fef32cc71480ddf824584e24743", "versionType": "git"}, {"status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "b0e44dfb4e4c699cca33ede431b8d127e6e8d661", "versionType": "git"}, {"status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "9c177eee116cf888276d3748cb176e72562cfd5c", "versionType": "git"}, {"status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "8823ea27fff6084bbb4bc71d15378fae0220b1d8", "versionType": "git"}, {"status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "lessThan": "daf972118c517b91f74ff1731417feb4270625a4", "versionType": "git"}], "programFiles": ["arch/x86/hyperv/hv_init.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"status": "unaffected", "version": "0", "lessThan": "4.16", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.218", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.162", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.82", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.5", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/x86/hyperv/hv_init.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743"}, {"url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661"}, {"url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c"}, {"url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8"}, {"url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4"}], "x_generator": {"engine": "bippy-5f407fcff5a0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails\n\nCheck for a valid hv_vp_index array prior to derefencing hv_vp_index when\nsetting Hyper-V's TSC change callback. If Hyper-V setup failed in\nhyperv_init(), the kernel will still report that it's running under\nHyper-V, but will have silently disabled nearly all functionality.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP\n CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:set_hv_tscchange_cb+0x15/0xa0\n Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08\n ...\n Call Trace:\n kvm_arch_init+0x17c/0x280\n kvm_init+0x31/0x330\n vmx_init+0xba/0x13a\n do_one_initcall+0x41/0x1c0\n kernel_init_freeable+0x1f2/0x23b\n kernel_init+0x16/0x120\n ret_from_fork+0x22/0x30"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T07:37:36.278Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47217", "state": "PUBLISHED", "dateUpdated": "2024-12-19T07:37:36.278Z", "dateReserved": "2024-04-10T18:59:19.528Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-10T19:01:56.419Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/hyperv/hv_init.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b20ec58f8a6f4fef32cc71480ddf824584e24743", "status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "versionType": "git"}, {"lessThan": "b0e44dfb4e4c699cca33ede431b8d127e6e8d661", "status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "versionType": "git"}, {"lessThan": "9c177eee116cf888276d3748cb176e72562cfd5c", "status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "versionType": "git"}, {"lessThan": "8823ea27fff6084bbb4bc71d15378fae0220b1d8", "status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "versionType": "git"}, {"lessThan": "daf972118c517b91f74ff1731417feb4270625a4", "status": "affected", "version": "93286261de1b46339aa27cd4c639b21778f6cade", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/hyperv/hv_init.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"lessThan": "4.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.218", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.162", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.82", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3917EFBF-AD24-48ED-B8B4-4F6BA6A5E0E0", "versionEndExcluding": "4.19.218", "versionStartIncluding": "4.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "51A152D8-D5CE-47BD-9041-DEE164DCE99D", "versionEndExcluding": "5.4.162", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AE501832-500C-4EF1-9489-5C13674F619D", "versionEndExcluding": "5.10.82", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2128A085-4C0C-4C1E-9E9C-0DD868E2170F", "versionEndExcluding": "5.15.5", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails\n\nCheck for a valid hv_vp_index array prior to derefencing hv_vp_index when\nsetting Hyper-V's TSC change callback. If Hyper-V setup failed in\nhyperv_init(), the kernel will still report that it's running under\nHyper-V, but will have silently disabled nearly all functionality.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000010\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP\n CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:set_hv_tscchange_cb+0x15/0xa0\n Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08\n ...\n Call Trace:\n kvm_arch_init+0x17c/0x280\n kvm_init+0x31/0x330\n vmx_init+0xba/0x13a\n do_one_initcall+0x41/0x1c0\n kernel_init_freeable+0x1f2/0x23b\n kernel_init+0x16/0x120\n ret_from_fork+0x22/0x30"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/hyperv: Se corrige la desreferencia NULL en set_hv_tscchange_cb() si falla la configuraci\u00f3n de Hyper-V. Verifique si hay una matriz hv_vp_index v\u00e1lida antes de desreferenciar hv_vp_index al configurar la devoluci\u00f3n de llamada de cambio de TSC de Hyper-V. Si la configuraci\u00f3n de Hyper-V fall\u00f3 en hyperv_init(), el kernel a\u00fan informar\u00e1 que se est\u00e1 ejecutando bajo Hyper-V, pero habr\u00e1 deshabilitado silenciosamente casi todas las funciones. ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000010 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Oops: 0000 [#1] SMP CPU: 4 PID: 1 Comm: swapper/0 No contaminado 5.15.0-rc2+ #75 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:set_hv_tscchange_cb+0x15/0xa0 C\u00f3digo: &lt;8b&gt; 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08 ... Seguimiento de llamadas: kvm_arch_init+0x17c/0x280 kvm_init+0x31/0x330 vmx_init+0xba/0x13a do_one_initcall+0x41/0x1c0 kernel_init_freeable+0x1f2/0x23b kernel_init+0x16/0x120 ret_from_fork+0x22/0x30"}], "id": "CVE-2021-47217", "lastModified": "2026-06-17T04:16:55.890", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47217", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-17T18:03:45.646426Z", "version": "2.0.3"}}]}, "published": "2024-04-10T19:15:48.813", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails", "id": "2274604", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274604"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nx86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails\nCheck for a valid hv_vp_index array prior to derefencing hv_vp_index when\nsetting Hyper-V's TSC change callback. If Hyper-V setup failed in\nhyperv_init(), the kernel will still report that it's running under\nHyper-V, but will have silently disabled nearly all functionality.\nBUG: kernel NULL pointer dereference, address: 0000000000000010\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 0 P4D 0\nOops: 0000 [#1] SMP\nCPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\nRIP: 0010:set_hv_tscchange_cb+0x15/0xa0\nCode: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08\n...\nCall Trace:\nkvm_arch_init+0x17c/0x280\nkvm_init+0x31/0x330\nvmx_init+0xba/0x13a\ndo_one_initcall+0x41/0x1c0\nkernel_init_freeable+0x1f2/0x23b\nkernel_init+0x16/0x120\nret_from_fork+0x22/0x30"], "name": "CVE-2021-47217", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47217\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47217\nhttps://lore.kernel.org/linux-cve-announce/2024041006-CVE-2021-47217-a7d0@gregkh/T"], "threat_severity": "Low"}

{}