CVE-2021-47090 (GCVE-0-2021-47090)

Vulnerability from cvelistv5 – Published: 2024-03-04 18:10 – Updated: 2026-05-11 13:47
VLAI?
Title
mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page() Hulk Robot reported a panic in put_page_testzero() when testing madvise() with MADV_SOFT_OFFLINE. The BUG() is triggered when retrying get_any_page(). This is because we keep MF_COUNT_INCREASED flag in second try but the refcnt is not increased. page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:737! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 5 PID: 2135 Comm: sshd Tainted: G B 5.16.0-rc6-dirty #373 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: release_pages+0x53f/0x840 Call Trace: free_pages_and_swap_cache+0x64/0x80 tlb_flush_mmu+0x6f/0x220 unmap_page_range+0xe6c/0x12c0 unmap_single_vma+0x90/0x170 unmap_vmas+0xc4/0x180 exit_mmap+0xde/0x3a0 mmput+0xa3/0x250 do_exit+0x564/0x1470 do_group_exit+0x3b/0x100 __do_sys_exit_group+0x13/0x20 __x64_sys_exit_group+0x16/0x20 do_syscall_64+0x34/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae Modules linked in: ---[ end trace e99579b570fe0649 ]--- RIP: 0010:release_pages+0x53f/0x840
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b94e02822debdf0cc473556aad7dcc859f216653 , < 1f207076740101fed87074a6bc924dbe806f08a5 (git)
Affected: b94e02822debdf0cc473556aad7dcc859f216653 , < c691e7575eff76e563b0199c23ec46bd454f43e3 (git)
Affected: b94e02822debdf0cc473556aad7dcc859f216653 , < 2a57d83c78f889bf3f54eede908d0643c40d5418 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.89 , ≤ 5.10.* (semver)
Unaffected: 5.15.12 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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This is because we keep MF_COUNT_INCREASED flag in\\nsecond try but the refcnt is not increased.\\n\\n    page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)\\n    ------------[ cut here ]------------\\n    kernel BUG at include/linux/mm.h:737!\\n    invalid opcode: 0000 [#1] PREEMPT SMP\\n    CPU: 5 PID: 2135 Comm: sshd Tainted: G    B             5.16.0-rc6-dirty #373\\n    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\\n    RIP: release_pages+0x53f/0x840\\n    Call Trace:\\n      free_pages_and_swap_cache+0x64/0x80\\n      tlb_flush_mmu+0x6f/0x220\\n      unmap_page_range+0xe6c/0x12c0\\n      unmap_single_vma+0x90/0x170\\n      unmap_vmas+0xc4/0x180\\n      exit_mmap+0xde/0x3a0\\n      mmput+0xa3/0x250\\n      do_exit+0x564/0x1470\\n      do_group_exit+0x3b/0x100\\n      __do_sys_exit_group+0x13/0x20\\n      __x64_sys_exit_group+0x16/0x20\\n      do_syscall_64+0x34/0x80\\n      entry_SYSCALL_64_after_hwframe+0x44/0xae\\n    Modules linked in:\\n    ---[ end trace e99579b570fe0649 ]---\\n    RIP: 0010:release_pages+0x53f/0x840\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mm/hwpoison: borre MF_COUNT_INCREASED antes de volver a intentar get_any_page() Hulk Robot inform\u00f3 un p\u00e1nico en put_page_testzero() al probar madvise() con MADV_SOFT_OFFLINE. El ERROR() se activa al volver a intentar get_any_page(). Esto se debe a que mantenemos el indicador MF_COUNT_INCREASED en el segundo intento pero el refcnt no aumenta. p\u00e1gina volcada porque: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cortar aqu\u00ed ]------------ ERROR del kernel en include/linux/mm .h:737! c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP CPU: 5 PID: 2135 Comm: sshd Contaminado: GB 5.16.0-rc6-dirty #373 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0- 1ubuntu1.1 01/04/2014 RIP: release_pages+0x53f/0x840 Seguimiento de llamadas: free_pages_and_swap_cache+0x64/0x80 tlb_flush_mmu+0x6f/0x220 unmap_page_range+0xe6c/0x12c0 unmap_single_vma+0x90/0x170 unmap _vmas+0xc4/0x180 salida_mmap+0xde/0x3a0 mmput+ 0xa3/0x250 do_exit+0x564/0x1470 do_group_exit+0x3b/0x100 __do_sys_exit_group+0x13/0x20 __x64_sys_exit_group+0x16/0x20 do_syscall_64+0x34/0x80 Entry_SYSCALL_64_after_hwframe+ 0x44/0xae M\u00f3dulos vinculados en: ---[ end trace e99579b570fe0649 ]--- RIP: 0010:p\u00e1ginas_de_liberaci\u00f3n+0x53f/0x840\"}],\"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\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10\",\"versionEndExcluding\":\"5.10.89\",\"matchCriteriaId\":\"205A941A-BAE7-4625-8AE4-C40185E63375\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.12\",\"matchCriteriaId\":\"732BA914-7B3B-43CD-857F-8119106F6F71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"357AA433-37E8-4323-BFB2-3038D6E4B414\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A73429BA-C2D9-4D0C-A75F-06A1CA8B3983\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F621B5E3-E99D-49E7-90B9-EC3B77C95383\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"F7BFDCAA-1650-49AA-8462-407DD593F94F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"6EC9882F-866D-4ACB-8FBC-213D8D8436C8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"8A0915FE-A4AA-4C94-B783-CF29D81E7E54\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mailing List\",\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:39.860Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47090\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-26T20:39:00.892083Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-26T20:40:02.163Z\"}}], \"cna\": {\"title\": \"mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"b94e02822debdf0cc473556aad7dcc859f216653\", \"lessThan\": \"1f207076740101fed87074a6bc924dbe806f08a5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b94e02822debdf0cc473556aad7dcc859f216653\", \"lessThan\": \"c691e7575eff76e563b0199c23ec46bd454f43e3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b94e02822debdf0cc473556aad7dcc859f216653\", \"lessThan\": \"2a57d83c78f889bf3f54eede908d0643c40d5418\", \"versionType\": \"git\"}], \"programFiles\": [\"mm/memory-failure.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.89\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"mm/memory-failure.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\"}, {\"url\": \"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\"}, {\"url\": \"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()\\n\\nHulk Robot reported a panic in put_page_testzero() when testing\\nmadvise() with MADV_SOFT_OFFLINE.  The BUG() is triggered when retrying\\nget_any_page().  This is because we keep MF_COUNT_INCREASED flag in\\nsecond try but the refcnt is not increased.\\n\\n    page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)\\n    ------------[ cut here ]------------\\n    kernel BUG at include/linux/mm.h:737!\\n    invalid opcode: 0000 [#1] PREEMPT SMP\\n    CPU: 5 PID: 2135 Comm: sshd Tainted: G    B             5.16.0-rc6-dirty #373\\n    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\\n    RIP: release_pages+0x53f/0x840\\n    Call Trace:\\n      free_pages_and_swap_cache+0x64/0x80\\n      tlb_flush_mmu+0x6f/0x220\\n      unmap_page_range+0xe6c/0x12c0\\n      unmap_single_vma+0x90/0x170\\n      unmap_vmas+0xc4/0x180\\n      exit_mmap+0xde/0x3a0\\n      mmput+0xa3/0x250\\n      do_exit+0x564/0x1470\\n      do_group_exit+0x3b/0x100\\n      __do_sys_exit_group+0x13/0x20\\n      __x64_sys_exit_group+0x16/0x20\\n      do_syscall_64+0x34/0x80\\n      entry_SYSCALL_64_after_hwframe+0x44/0xae\\n    Modules linked in:\\n    ---[ end trace e99579b570fe0649 ]---\\n    RIP: 0010:release_pages+0x53f/0x840\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.89\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.12\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"5.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:03:55.428Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47090\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:03:55.428Z\", \"dateReserved\": \"2024-02-29T22:33:44.300Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-04T18:10:28.887Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.