cve-2021-47217
Vulnerability from cvelistv5
Published
2024-04-10 19:01
Modified
2024-12-19 07:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails Check for a valid hv_vp_index array prior to derefencing hv_vp_index when setting Hyper-V's TSC change callback. If Hyper-V setup failed in hyperv_init(), the kernel will still report that it's running under Hyper-V, but will have silently disabled nearly all functionality. BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc2+ #75 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:set_hv_tscchange_cb+0x15/0xa0 Code: <8b> 04 82 8b 15 12 17 85 01 48 c1 e0 20 48 0d ee 00 01 00 f6 c6 08 ... Call Trace: 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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8823ea27fff6084bbb4bc71d15378fae0220b1d8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9c177eee116cf888276d3748cb176e72562cfd5cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b0e44dfb4e4c699cca33ede431b8d127e6e8d661Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b20ec58f8a6f4fef32cc71480ddf824584e24743Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/daf972118c517b91f74ff1731417feb4270625a4Patch
Impacted products
Vendor Product Version
Linux Linux Version: 93286261de1b46339aa27cd4c639b21778f6cade
Version: 93286261de1b46339aa27cd4c639b21778f6cade
Version: 93286261de1b46339aa27cd4c639b21778f6cade
Version: 93286261de1b46339aa27cd4c639b21778f6cade
Version: 93286261de1b46339aa27cd4c639b21778f6cade
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   Linux Linux Version: 4.16
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    "vulnrichment": {
      "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\u0027s TSC change callback.  If Hyper-V setup failed in\\nhyperv_init(), the kernel will still report that it\u0027s 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: \u003c8b\u003e 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\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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