{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-14T18:54:17.921","vulnerabilities":[{"cve":{"id":"CVE-2021-47217","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-04-10T19:15:48.813","lastModified":"2025-01-14T14:44:11.917","vulnStatus":"Analyzed","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 configuración de Hyper-V. Verifique si hay una matriz hv_vp_index válida antes de desreferenciar hv_vp_index al configurar la devolución de llamada de cambio de TSC de Hyper-V. Si la configuración de Hyper-V falló en hyperv_init(), el kernel aún informará que se está ejecutando bajo Hyper-V, pero habrá deshabilitado silenciosamente casi todas las funciones. ERROR: desreferencia de puntero NULL del kernel, dirección: 0000000000000010 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - página 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 Código: &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"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1\/AV:L\/AC:L\/PR:L\/UI:N\/S:U\/C:N\/I:N\/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"4.19.218","matchCriteriaId":"3917EFBF-AD24-48ED-B8B4-4F6BA6A5E0E0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.162","matchCriteriaId":"51A152D8-D5CE-47BD-9041-DEE164DCE99D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.82","matchCriteriaId":"AE501832-500C-4EF1-9489-5C13674F619D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.5","matchCriteriaId":"2128A085-4C0C-4C1E-9E9C-0DD868E2170F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*","matchCriteriaId":"357AA433-37E8-4323-BFB2-3038D6E4B414"}]}]}],"references":[{"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":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","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","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}