Vulnerability-Lookup

BDU:2025-13694 (CVE-2021-47117)

Vulnerability from fstec – Published: 2025-11-05 – Updated: 2025-11-05 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции ext4_split_extent_at() модуля fs/ext4/extents.c поддержки файловой системы Ext4 ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании.

Summary

Уязвимость функции ext4_split_extent_at() модуля fs/ext4/extents.c поддержки файловой системы Ext4 ядра операционной системы Linux связана с неправильной проверкой вводимых данных. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании.

Severity

4.6 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:N/I:N/A:C

5.5 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-20 - Недостаточная проверка вводимых данных

Aliases

CVE-2021-47117

References

19 references

URL
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47117
https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb
https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071
https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9
https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107
https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7
https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a
https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c
https://lore.kernel.org/linux-cve-announce/2024031508-CVE-2021-47117-5ea7@gregkh/
https://git.kernel.org/linus/082cd4ec240b8734a82a89ffb890216ac98fec68
https://www.cve.org/CVERecord?id=CVE-2021-47117
https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commi…
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.272
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.272
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.236
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.194
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10

Impacted products

1 product from 1 vendor

Vendors

Сообщество свободного программного обеспечения

Products

Linux

Versions

от 4.5 до 4.9.271 включительно (Linux), от 4.10 до 4.14.235 включительно (Linux), от 4.15 до 4.19.193 включительно (Linux), от 4.20 до 5.4.124 включительно (Linux), от 5.5 до 5.10.42 включительно (Linux), от 5.11 до 5.12.9 включительно (Linux), от 2.6.12 до 4.4.271 включительно (Linux)

Product types

Operating system

Platforms

Сообщество свободного программного обеспечения Linux от 4.5 до 4.9.271 включительно, Сообщество свободного программного обеспечения Linux от 4.10 до 4.14.235 включительно, Сообщество свободного программного обеспечения Linux от 4.15 до 4.19.193 включительно, Сообщество свободного программного обеспечения Linux от 4.20 до 5.4.124 включительно, Сообщество свободного программного обеспечения Linux от 5.5 до 5.10.42 включительно, Сообщество свободного программного обеспечения Linux от 5.11 до 5.12.9 включительно, Сообщество свободного программного обеспечения Linux от 2.6.12 до 4.4.271 включительно

Mitigations

В условиях отсутствия обновлений безопасности от производителя рекомендуется придерживаться "Рекомендаций по безопасной настройке операционных систем LINUX", изложенных в методическом документе ФСТЭК России, утверждённом 25 декабря 2022 года. Использование рекомендаций: Для Linux: https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071 https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9 https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107 https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7 https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c https://lore.kernel.org/linux-cve-announce/2024031508-CVE-2021-47117-5ea7@gregkh/ https://git.kernel.org/linus/082cd4ec240b8734a82a89ffb890216ac98fec68 https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=d3b668b96ad3192c0581a248ae2f596cd054792a https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.272 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.272 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.236 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.194 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:N/I:N/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u043e\u0442 4.5 \u0434\u043e 4.9.271 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.10 \u0434\u043e 4.14.235 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.193 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.124 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.5 \u0434\u043e 5.10.42 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.12.9 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 2.6.12 \u0434\u043e 4.4.271 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0412 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \"\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u043e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0439 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c LINUX\", \u0438\u0437\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u0432 \u043c\u0435\u0442\u043e\u0434\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u0424\u0421\u0422\u042d\u041a \u0420\u043e\u0441\u0441\u0438\u0438, \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d\u043d\u043e\u043c 25 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2022 \u0433\u043e\u0434\u0430.\n\n\n\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\n\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb\nhttps://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071\nhttps://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9\nhttps://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107\nhttps://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7\nhttps://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a\nhttps://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c\nhttps://lore.kernel.org/linux-cve-announce/2024031508-CVE-2021-47117-5ea7@gregkh/\nhttps://git.kernel.org/linus/082cd4ec240b8734a82a89ffb890216ac98fec68\nhttps://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1\u0026id=d3b668b96ad3192c0581a248ae2f596cd054792a\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.272\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.272\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.236\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.194\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "06.06.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "05.11.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "05.11.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-13694",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-47117",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Linux",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.5 \u0434\u043e 4.9.271 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.10 \u0434\u043e 4.14.235 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.15 \u0434\u043e 4.19.193 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.20 \u0434\u043e 5.4.124 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.5 \u0434\u043e 5.10.42 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.11 \u0434\u043e 5.12.9 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 2.6.12 \u0434\u043e 4.4.271 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 ext4_split_extent_at() \u043c\u043e\u0434\u0443\u043b\u044f fs/ext4/extents.c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Ext4 \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438.",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u0430\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 (CWE-20)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 ext4_split_extent_at() \u043c\u043e\u0434\u0443\u043b\u044f fs/ext4/extents.c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Ext4 \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438.",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47117\nhttps://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb\nhttps://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071\nhttps://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9\nhttps://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107\nhttps://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7\nhttps://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a\nhttps://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c\nhttps://lore.kernel.org/linux-cve-announce/2024031508-CVE-2021-47117-5ea7@gregkh/\nhttps://git.kernel.org/linus/082cd4ec240b8734a82a89ffb890216ac98fec68\nhttps://www.cve.org/CVERecord?id=CVE-2021-47117\nhttps://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1\u0026id=d3b668b96ad3192c0581a248ae2f596cd054792a\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.272\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.272\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.236\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.194\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-20",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 4,6)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,5)"
}

CVE-2021-47117 (GCVE-0-2021-47117)

Vulnerability from cvelistv5 – Published: 2024-03-15 20:14 – Updated: 2026-05-11 13:48

Title

ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed We got follow bug_on when run fsstress with injecting IO fault: [130747.323114] kernel BUG at fs/ext4/extents_status.c:762! [130747.323117] Internal error: Oops - BUG: 0 [#1] SMP ...... [130747.334329] Call trace: [130747.334553] ext4_es_cache_extent+0x150/0x168 [ext4] [130747.334975] ext4_cache_extents+0x64/0xe8 [ext4] [130747.335368] ext4_find_extent+0x300/0x330 [ext4] [130747.335759] ext4_ext_map_blocks+0x74/0x1178 [ext4] [130747.336179] ext4_map_blocks+0x2f4/0x5f0 [ext4] [130747.336567] ext4_mpage_readpages+0x4a8/0x7a8 [ext4] [130747.336995] ext4_readpage+0x54/0x100 [ext4] [130747.337359] generic_file_buffered_read+0x410/0xae8 [130747.337767] generic_file_read_iter+0x114/0x190 [130747.338152] ext4_file_read_iter+0x5c/0x140 [ext4] [130747.338556] __vfs_read+0x11c/0x188 [130747.338851] vfs_read+0x94/0x150 [130747.339110] ksys_read+0x74/0xf0 This patch's modification is according to Jan Kara's suggestion in: https://patchwork.ozlabs.org/project/linux-ext4/patch/20210428085158.3728201-1-yebin10@huawei.com/ "I see. Now I understand your patch. Honestly, seeing how fragile is trying to fix extent tree after split has failed in the middle, I would probably go even further and make sure we fix the tree properly in case of ENOSPC and EDQUOT (those are easily user triggerable). Anything else indicates a HW problem or fs corruption so I'd rather leave the extent tree as is and don't try to fix it (which also means we will not create overlapping extents)."

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-18 14:32 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/e33bafad30d34cfa5…
https://git.kernel.org/stable/c/5b3a9a2be59478b01…
https://git.kernel.org/stable/c/d8116743ef5432336…
https://git.kernel.org/stable/c/569496aa3776eea1f…
https://git.kernel.org/stable/c/920697b004e49cb02…
https://git.kernel.org/stable/c/d3b668b96ad3192c0…
https://git.kernel.org/stable/c/48105dc98c9ca35af…
https://git.kernel.org/stable/c/082cd4ec240b8734a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < e33bafad30d34cfa5e9787cb099cab05e2677fcb (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < 5b3a9a2be59478b013a430ac57b0f3d65471b071 (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < d8116743ef5432336289256b2f7c117299213eb9 (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < 569496aa3776eea1ff0d49d0174ac1b7e861e107 (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < 920697b004e49cb026e2e15fe91be065bf0741b7 (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < d3b668b96ad3192c0581a248ae2f596cd054792a (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < 48105dc98c9ca35af418746277b087cb2bc6df7c (git) Affected: adb2355104b2109e06ba5276485d187d023b2fd2 , < 082cd4ec240b8734a82a89ffb890216ac98fec68 (git)
Linux	Linux	Affected: 3.9 Unaffected: 0 , < 3.9 (semver) Unaffected: 4.4.272 , ≤ 4.4.* (semver) Unaffected: 4.9.272 , ≤ 4.9.* (semver) Unaffected: 4.14.236 , ≤ 4.14.* (semver) Unaffected: 4.19.194 , ≤ 4.19.* (semver) Unaffected: 5.4.125 , ≤ 5.4.* (semver) Unaffected: 5.10.43 , ≤ 5.10.* (semver) Unaffected: 5.12.10 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47117",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-18T14:32:59.932623Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:13:39.668Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.794Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb"
          },
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            "url": "https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9"
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        "title": "CVE Program Container"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "3.9"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "4.4.272",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "4.9.272",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.236",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.194",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.4.125",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.272",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "4.9.272",
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                  "versionEndExcluding": "5.13",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed\n\nWe got follow bug_on when run fsstress with injecting IO fault:\n[130747.323114] kernel BUG at fs/ext4/extents_status.c:762!\n[130747.323117] Internal error: Oops - BUG: 0 [#1] SMP\n......\n[130747.334329] Call trace:\n[130747.334553]  ext4_es_cache_extent+0x150/0x168 [ext4]\n[130747.334975]  ext4_cache_extents+0x64/0xe8 [ext4]\n[130747.335368]  ext4_find_extent+0x300/0x330 [ext4]\n[130747.335759]  ext4_ext_map_blocks+0x74/0x1178 [ext4]\n[130747.336179]  ext4_map_blocks+0x2f4/0x5f0 [ext4]\n[130747.336567]  ext4_mpage_readpages+0x4a8/0x7a8 [ext4]\n[130747.336995]  ext4_readpage+0x54/0x100 [ext4]\n[130747.337359]  generic_file_buffered_read+0x410/0xae8\n[130747.337767]  generic_file_read_iter+0x114/0x190\n[130747.338152]  ext4_file_read_iter+0x5c/0x140 [ext4]\n[130747.338556]  __vfs_read+0x11c/0x188\n[130747.338851]  vfs_read+0x94/0x150\n[130747.339110]  ksys_read+0x74/0xf0\n\nThis patch\u0027s modification is according to Jan Kara\u0027s suggestion in:\nhttps://patchwork.ozlabs.org/project/linux-ext4/patch/20210428085158.3728201-1-yebin10@huawei.com/\n\"I see. Now I understand your patch. Honestly, seeing how fragile is trying\nto fix extent tree after split has failed in the middle, I would probably\ngo even further and make sure we fix the tree properly in case of ENOSPC\nand EDQUOT (those are easily user triggerable).  Anything else indicates a\nHW problem or fs corruption so I\u0027d rather leave the extent tree as is and\ndon\u0027t try to fix it (which also means we will not create overlapping\nextents).\""
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:48:22.727Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b3a9a2be59478b013a430ac57b0f3d65471b071"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8116743ef5432336289256b2f7c117299213eb9"
        },
        {
          "url": "https://git.kernel.org/stable/c/569496aa3776eea1ff0d49d0174ac1b7e861e107"
        },
        {
          "url": "https://git.kernel.org/stable/c/920697b004e49cb026e2e15fe91be065bf0741b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3b668b96ad3192c0581a248ae2f596cd054792a"
        },
        {
          "url": "https://git.kernel.org/stable/c/48105dc98c9ca35af418746277b087cb2bc6df7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/082cd4ec240b8734a82a89ffb890216ac98fec68"
        }
      ],
      "title": "ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47117",
    "datePublished": "2024-03-15T20:14:24.291Z",
    "dateReserved": "2024-03-04T18:12:48.838Z",
    "dateUpdated": "2026-05-11T13:48:22.727Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2025-13694 (CVE-2021-47117)

CVE-2021-47117 (GCVE-0-2021-47117)

Tags

Sightings

Nomenclature

Related by attack behaviour