Vulnerability-Lookup

BDU:2024-10598 (CVE-2021-47274)

Vulnerability from fstec – Published: 2024-12-03 – Updated: 2024-12-03 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции trace_event_buffer_lock_reserve() ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Summary

Уязвимость функции trace_event_buffer_lock_reserve() в модуле kernel/trace/trace.c ядра операционной системы Linux связана с записью памяти за пределами выделенного буфера. Эксплуатация уязвимости может позволить нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Severity

10.0 (High) CVSS 2.0


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

9.8 (Critical) CVSS 3.0


                      
                        CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-787 - Запись за границами буфера

Aliases

CVE-2021-47274

References

17 references

URL
https://www.cve.org/CVERecord?id=CVE-2021-47274
https://git.kernel.org/stable/c/edcce01e0e50840a9aa6a70baed21477bdd2c9f9
https://git.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097f
https://git.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883
https://git.kernel.org/stable/c/d63f00ec908b3be635ead5d6029cc94246e1f38d
https://git.kernel.org/stable/c/43c32c22254b9328d7abb1c2b0f689dc67838e60
https://git.kernel.org/stable/c/b16a249eca2230c2cd66fa1d4b94743bd9b6ef92
https://git.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3
https://lore.kernel.org/linux-cve-announce/2024052151-CVE-2021-47274-3867@gregkh/
https://git.kernel.org/linus/3e08a9f9760f4a70d633c328a76408e62d6f80a3
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.273
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.237
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.195
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.126
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.44
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11
https://security-tracker.debian.org/tracker/CVE-2021-47274

Impacted products

2 products from 1 vendor

Vendors

Сообщество свободного программного обеспечения

Products

Debian GNU/Linux, Linux

Versions

10 (Debian GNU/Linux), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), от 5.11 до 5.12.10 включительно (Linux), от 4.9.258 до 4.9.272 включительно (Linux), от 4.14.222 до 4.14.236 включительно (Linux), от 4.19.177 до 4.19.194 включительно (Linux), от 5.4.99 до 5.4.125 включительно (Linux), от 5.10.17 до 5.10.43 включительно (Linux)

Product types

Operating system

Platforms

Сообщество свободного программного обеспечения Debian GNU/Linux 10, Сообщество свободного программного обеспечения Debian GNU/Linux 11, Сообщество свободного программного обеспечения Debian GNU/Linux 12, Сообщество свободного программного обеспечения Linux от 5.11 до 5.12.10 включительно, Сообщество свободного программного обеспечения Linux от 4.9.258 до 4.9.272 включительно, Сообщество свободного программного обеспечения Linux от 4.14.222 до 4.14.236 включительно, Сообщество свободного программного обеспечения Linux от 4.19.177 до 4.19.194 включительно, Сообщество свободного программного обеспечения Linux от 5.4.99 до 5.4.125 включительно, Сообщество свободного программного обеспечения Linux от 5.10.17 до 5.10.43 включительно

Mitigations

Использование рекомендаций: Для Linux: https://git.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097f https://git.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883 https://git.kernel.org/stable/c/d63f00ec908b3be635ead5d6029cc94246e1f38d https://git.kernel.org/stable/c/43c32c22254b9328d7abb1c2b0f689dc67838e60 https://git.kernel.org/stable/c/b16a249eca2230c2cd66fa1d4b94743bd9b6ef92 https://git.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3 https://lore.kernel.org/linux-cve-announce/2024052151-CVE-2021-47274-3867@gregkh/ https://git.kernel.org/linus/3e08a9f9760f4a70d633c328a76408e62d6f80a3 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.273 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.237 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.195 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.126 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.44 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11 Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2021-47274

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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": "10 (Debian GNU/Linux), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), \u043e\u0442 5.11 \u0434\u043e 5.12.10 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.9.258 \u0434\u043e 4.9.272 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.14.222 \u0434\u043e 4.14.236 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.19.177 \u0434\u043e 4.19.194 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.4.99 \u0434\u043e 5.4.125 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.10.17 \u0434\u043e 5.10.43 \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": "\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\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097f\nhttps://git.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883\nhttps://git.kernel.org/stable/c/d63f00ec908b3be635ead5d6029cc94246e1f38d\nhttps://git.kernel.org/stable/c/43c32c22254b9328d7abb1c2b0f689dc67838e60\nhttps://git.kernel.org/stable/c/b16a249eca2230c2cd66fa1d4b94743bd9b6ef92\nhttps://git.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3\nhttps://lore.kernel.org/linux-cve-announce/2024052151-CVE-2021-47274-3867@gregkh/\nhttps://git.kernel.org/linus/3e08a9f9760f4a70d633c328a76408e62d6f80a3\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.273\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.237\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.195\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.126\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.44\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2021-47274",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "08.06.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "03.12.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "03.12.2024",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2024-10598",
  "\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-2021-47274",
  "\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": "Debian GNU/Linux, 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 Debian GNU/Linux 10 , \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 Debian GNU/Linux 11 , \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 Debian GNU/Linux 12 , \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 5.12.10 \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 4.9.258 \u0434\u043e 4.9.272 \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 4.14.222 \u0434\u043e 4.14.236 \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 4.19.177 \u0434\u043e 4.19.194 \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 5.4.99 \u0434\u043e 5.4.125 \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 5.10.17 \u0434\u043e 5.10.43 \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 trace_event_buffer_lock_reserve() \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 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u043d\u0430 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\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": "\u0417\u0430\u043f\u0438\u0441\u044c \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c\u0438 \u0431\u0443\u0444\u0435\u0440\u0430 (CWE-787)",
  "\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 trace_event_buffer_lock_reserve() \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 kernel/trace/trace.c \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 \u0437\u0430\u043f\u0438\u0441\u044c\u044e \u043f\u0430\u043c\u044f\u0442\u0438 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430. \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 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u043d\u0430 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\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 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://www.cve.org/CVERecord?id=CVE-2021-47274\nhttps://git.kernel.org/stable/c/edcce01e0e50840a9aa6a70baed21477bdd2c9f9\nhttps://git.kernel.org/stable/c/2d598902799886d67947406f26ee8e5fd2ca097f\nhttps://git.kernel.org/stable/c/31ceae385556c37e4d286cb6378696448f566883\nhttps://git.kernel.org/stable/c/d63f00ec908b3be635ead5d6029cc94246e1f38d\nhttps://git.kernel.org/stable/c/43c32c22254b9328d7abb1c2b0f689dc67838e60\nhttps://git.kernel.org/stable/c/b16a249eca2230c2cd66fa1d4b94743bd9b6ef92\nhttps://git.kernel.org/stable/c/3e08a9f9760f4a70d633c328a76408e62d6f80a3\nhttps://lore.kernel.org/linux-cve-announce/2024052151-CVE-2021-47274-3867@gregkh/\nhttps://git.kernel.org/linus/3e08a9f9760f4a70d633c328a76408e62d6f80a3\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.273\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.237\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.195\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.126\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.44\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11\nhttps://security-tracker.debian.org/tracker/CVE-2021-47274",
  "\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-787",
  "\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": "\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\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 10)\n\u041a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\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 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 9,8)"
}

CVE-2021-47274 (GCVE-0-2021-47274)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:20 – Updated: 2026-08-05 08:47

Title

tracing: Correct the length check which causes memory corruption

Summary

In the Linux kernel, the following vulnerability has been resolved: tracing: Correct the length check which causes memory corruption We've suffered from severe kernel crashes due to memory corruption on our production environment, like, Call Trace: [1640542.554277] general protection fault: 0000 [#1] SMP PTI [1640542.554856] CPU: 17 PID: 26996 Comm: python Kdump: loaded Tainted:G [1640542.556629] RIP: 0010:kmem_cache_alloc+0x90/0x190 [1640542.559074] RSP: 0018:ffffb16faa597df8 EFLAGS: 00010286 [1640542.559587] RAX: 0000000000000000 RBX: 0000000000400200 RCX: 0000000006e931bf [1640542.560323] RDX: 0000000006e931be RSI: 0000000000400200 RDI: ffff9a45ff004300 [1640542.560996] RBP: 0000000000400200 R08: 0000000000023420 R09: 0000000000000000 [1640542.561670] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff9a20608d [1640542.562366] R13: ffff9a45ff004300 R14: ffff9a45ff004300 R15: 696c662f65636976 [1640542.563128] FS: 00007f45d7c6f740(0000) GS:ffff9a45ff840000(0000) knlGS:0000000000000000 [1640542.563937] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [1640542.564557] CR2: 00007f45d71311a0 CR3: 000000189d63e004 CR4: 00000000003606e0 [1640542.565279] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [1640542.566069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [1640542.566742] Call Trace: [1640542.567009] anon_vma_clone+0x5d/0x170 [1640542.567417] __split_vma+0x91/0x1a0 [1640542.567777] do_munmap+0x2c6/0x320 [1640542.568128] vm_munmap+0x54/0x70 [1640542.569990] __x64_sys_munmap+0x22/0x30 [1640542.572005] do_syscall_64+0x5b/0x1b0 [1640542.573724] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [1640542.575642] RIP: 0033:0x7f45d6e61e27 James Wang has reproduced it stably on the latest 4.19 LTS. After some debugging, we finally proved that it's due to ftrace buffer out-of-bound access using a debug tool as follows: [ 86.775200] BUG: Out-of-bounds write at addr 0xffff88aefe8b7000 [ 86.780806] no_context+0xdf/0x3c0 [ 86.784327] __do_page_fault+0x252/0x470 [ 86.788367] do_page_fault+0x32/0x140 [ 86.792145] page_fault+0x1e/0x30 [ 86.795576] strncpy_from_unsafe+0x66/0xb0 [ 86.799789] fetch_memory_string+0x25/0x40 [ 86.804002] fetch_deref_string+0x51/0x60 [ 86.808134] kprobe_trace_func+0x32d/0x3a0 [ 86.812347] kprobe_dispatcher+0x45/0x50 [ 86.816385] kprobe_ftrace_handler+0x90/0xf0 [ 86.820779] ftrace_ops_assist_func+0xa1/0x140 [ 86.825340] 0xffffffffc00750bf [ 86.828603] do_sys_open+0x5/0x1f0 [ 86.832124] do_syscall_64+0x5b/0x1b0 [ 86.835900] entry_SYSCALL_64_after_hwframe+0x44/0xa9 commit b220c049d519 ("tracing: Check length before giving out the filter buffer") adds length check to protect trace data overflow introduced in 0fc1b09ff1ff, seems that this fix can't prevent overflow entirely, the length check should also take the sizeof entry->array[0] into account, since this array[0] is filled the length of trace data and occupy addtional space and risk overflow.

Severity

7.8 (High)


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

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-06 18:18 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/edcce01e0e50840a9…
https://git.kernel.org/stable/c/2d598902799886d67…
https://git.kernel.org/stable/c/31ceae385556c37e4…
https://git.kernel.org/stable/c/d63f00ec908b3be63…
https://git.kernel.org/stable/c/43c32c22254b9328d…
https://git.kernel.org/stable/c/b16a249eca2230c2c…
https://git.kernel.org/stable/c/3e08a9f9760f4a70d…

Impacted products

18 products

Vendor	Product	Version
Linux	Linux	Affected: 2e584b1a02eeb860e286d39bc408b25ebc5ec844 , < edcce01e0e50840a9aa6a70baed21477bdd2c9f9 (git) Affected: e46d433754420b4d6513ca389403de88a0910279 , < 2d598902799886d67947406f26ee8e5fd2ca097f (git) Affected: 0572fc6a510add9029b113239eaabf4b5bce8ec9 , < 31ceae385556c37e4d286cb6378696448f566883 (git) Affected: a0997a86f5c0085e183ddee5fb72091d584d3d16 , < d63f00ec908b3be635ead5d6029cc94246e1f38d (git) Affected: 7c93d8cff582c459350d6f8906eea6e4cd60d959 , < 43c32c22254b9328d7abb1c2b0f689dc67838e60 (git) Affected: b220c049d5196dd94d992dd2dc8cba1a5e6123bf , < b16a249eca2230c2cd66fa1d4b94743bd9b6ef92 (git) Affected: b220c049d5196dd94d992dd2dc8cba1a5e6123bf , < 3e08a9f9760f4a70d633c328a76408e62d6f80a3 (git) Affected: 4.9.258 , < 4.9.273 (semver) Affected: 4.14.222 , < 4.14.237 (semver) Affected: 4.19.177 , < 4.19.195 (semver) Affected: 5.4.99 , < 5.4.126 (semver) Affected: 5.10.17 , < 5.10.44 (semver)
Linux	Linux	Affected: 5.11 Unaffected: 0 , < 5.11 (semver) Unaffected: 4.9.273 , ≤ 4.9.* (semver) Unaffected: 4.14.237 , ≤ 4.14.* (semver) Unaffected: 4.19.195 , ≤ 4.19.* (semver) Unaffected: 5.4.126 , ≤ 5.4.* (semver) Unaffected: 5.10.44 , ≤ 5.10.* (semver) Unaffected: 5.12.11 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)
linux	linux_kernel	Affected: 2e584b1a02ee , < edcce01e0e50 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: e46d43375442 , < 2d5989027998 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: 0572fc6a510a , < 31ceae385556 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: a0997a86f5c0 , < d63f00ec908b (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: 7c93d8cff582 , < 43c32c22254b (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: b220c049d519 , < b16a249eca22 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: b220c049d519 , < 3e08a9f9760f (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Affected: 5.11 cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 0 , < 5.11 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 4.9.273 , ≤ 5.0 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 4.14.237 , ≤ 4.15 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 4.19.195 , ≤ 4.20 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 5.4.126 , ≤ 5.5 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 5.10.44 , ≤ 5.11 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 5.12.11 , ≤ 5.13 (custom) cpe:2.3:o:linux:linux_kernel:-:::::::*
linux	linux_kernel	Unaffected: 5.13 cpe:2.3:o:linux:linux_kernel:-:::::::*

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"
            ],
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              {
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              }
            ]
          },
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            ],
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            "versions": [
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              }
            ]
          },
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            ],
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          },
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Correct the length check which causes memory corruption\n\nWe\u0027ve suffered from severe kernel crashes due to memory corruption on\nour production environment, like,\n\nCall Trace:\n[1640542.554277] general protection fault: 0000 [#1] SMP PTI\n[1640542.554856] CPU: 17 PID: 26996 Comm: python Kdump: loaded Tainted:G\n[1640542.556629] RIP: 0010:kmem_cache_alloc+0x90/0x190\n[1640542.559074] RSP: 0018:ffffb16faa597df8 EFLAGS: 00010286\n[1640542.559587] RAX: 0000000000000000 RBX: 0000000000400200 RCX:\n0000000006e931bf\n[1640542.560323] RDX: 0000000006e931be RSI: 0000000000400200 RDI:\nffff9a45ff004300\n[1640542.560996] RBP: 0000000000400200 R08: 0000000000023420 R09:\n0000000000000000\n[1640542.561670] R10: 0000000000000000 R11: 0000000000000000 R12:\nffffffff9a20608d\n[1640542.562366] R13: ffff9a45ff004300 R14: ffff9a45ff004300 R15:\n696c662f65636976\n[1640542.563128] FS:  00007f45d7c6f740(0000) GS:ffff9a45ff840000(0000)\nknlGS:0000000000000000\n[1640542.563937] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[1640542.564557] CR2: 00007f45d71311a0 CR3: 000000189d63e004 CR4:\n00000000003606e0\n[1640542.565279] DR0: 0000000000000000 DR1: 0000000000000000 DR2:\n0000000000000000\n[1640542.566069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:\n0000000000000400\n[1640542.566742] Call Trace:\n[1640542.567009]  anon_vma_clone+0x5d/0x170\n[1640542.567417]  __split_vma+0x91/0x1a0\n[1640542.567777]  do_munmap+0x2c6/0x320\n[1640542.568128]  vm_munmap+0x54/0x70\n[1640542.569990]  __x64_sys_munmap+0x22/0x30\n[1640542.572005]  do_syscall_64+0x5b/0x1b0\n[1640542.573724]  entry_SYSCALL_64_after_hwframe+0x44/0xa9\n[1640542.575642] RIP: 0033:0x7f45d6e61e27\n\nJames Wang has reproduced it stably on the latest 4.19 LTS.\nAfter some debugging, we finally proved that it\u0027s due to ftrace\nbuffer out-of-bound access using a debug tool as follows:\n[   86.775200] BUG: Out-of-bounds write at addr 0xffff88aefe8b7000\n[   86.780806]  no_context+0xdf/0x3c0\n[   86.784327]  __do_page_fault+0x252/0x470\n[   86.788367]  do_page_fault+0x32/0x140\n[   86.792145]  page_fault+0x1e/0x30\n[   86.795576]  strncpy_from_unsafe+0x66/0xb0\n[   86.799789]  fetch_memory_string+0x25/0x40\n[   86.804002]  fetch_deref_string+0x51/0x60\n[   86.808134]  kprobe_trace_func+0x32d/0x3a0\n[   86.812347]  kprobe_dispatcher+0x45/0x50\n[   86.816385]  kprobe_ftrace_handler+0x90/0xf0\n[   86.820779]  ftrace_ops_assist_func+0xa1/0x140\n[   86.825340]  0xffffffffc00750bf\n[   86.828603]  do_sys_open+0x5/0x1f0\n[   86.832124]  do_syscall_64+0x5b/0x1b0\n[   86.835900]  entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\ncommit b220c049d519 (\"tracing: Check length before giving out\nthe filter buffer\") adds length check to protect trace data\noverflow introduced in 0fc1b09ff1ff, seems that this fix can\u0027t prevent\noverflow entirely, the length check should also take the sizeof\nentry-\u003earray[0] into account, since this array[0] is filled the\nlength of trace data and occupy addtional space and risk overflow."
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "lang": "en",
              "value": "AV:L - The overflow is in local ftrace filter buffering (trace_event_buffer_lock_reserve), reached after writing tracefs filter/kprobe/trigger controls and then generating a near-page-sized event; it is not reachable from network or adjacent-link packet processing alone.\nAC:L - An attacker who can configure a filtered/soft-disabled event fully controls record length (e.g., kprobe string fetch of a chosen path length, or other dynamic payloads) and can hit the vulnerable PAGE_SIZE-minus-header window reliably with no race outside their control.\nPR:L - Enabling the path needs only TRACE_MODE_WRITE (0640) access under tracefs DAC/LOCKDOWN_TRACEFS (no capable() gate), and worst reasonable deployments (Android/perfetto, ChromeOS, gid=tracing mounts) grant that write access to non-root tracing users, matching other filter/buffered-event scorings.\nUI:N - The attacker writes the filter/kprobe configuration and triggers the oversized event themselves; no separate victim action is required.\nS:U - The out-of-bounds write corrupts host kernel memory within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - This is a confirmed out-of-bounds write past the per-CPU filter page that caused production heap corruption; per guidance, exploitable memory corruption is treated as enabling high confidentiality impact.\nI:H - Out-of-bounds write past the allocated filter page is scored Integrity High, and the reported follow-on corruption (e.g., GPF in allocator paths) shows the overflow can corrupt adjacent kernel state usable for write/control-flow primitives.\nA:H - The bug was reproduced as an out-of-bounds write and caused severe kernel crashes/GPFs in production, which is High availability impact under kernel CVSS guidance."
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47274",
    "datePublished": "2024-05-21T14:20:02.694Z",
    "dateReserved": "2024-05-21T13:27:52.127Z",
    "dateUpdated": "2026-08-05T08:47:02.813Z",
    "state": "PUBLISHED"
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}

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.

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.

Related by attack behaviour

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.