Vulnerability-Lookup

BDU:2025-07402

Vulnerability from fstec - Published: 12.07.2021

Title

Уязвимость функции scsi_host_alloc() модуля drivers/scsi/hosts.c - драйвера поддержки устройств SCSI ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Description

Уязвимость функции scsi_host_alloc() модуля drivers/scsi/hosts.c - драйвера поддержки устройств SCSI ядра операционной системы Linux связана с разыменованием указателя NULL. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании.

Severity ?


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

Vendor

Сообщество свободного программного обеспечения

Software Name

Linux

Software Version

от 5.13 до 5.13.3 включительно (Linux), от 4.9.273 до 4.9.275 включительно (Linux), от 4.14.237 до 4.14.239 включительно (Linux), от 4.19.195 до 4.19.197 включительно (Linux), от 5.4.126 до 5.4.133 включительно (Linux), от 5.10.44 до 5.10.51 включительно (Linux), от 5.12.11 до 5.12.18 включительно (Linux)

Possible 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/887bfae2732b5b02a86a859fd239d34f7ff93c05 https://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92 https://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a https://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515 https://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b https://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691 https://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1 https://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd https://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47337-4863@gregkh/ https://git.kernel.org/linus/93aa71ad7379900e61c8adff6a710a4c18c7c99b https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=ea518b70ed5e4598c8d706f37fc16f7b06e440bd https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4

Reference

https://git.kernel.org/stable/c/887bfae2732b5b02a86a859fd239d34f7ff93c05 https://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92 https://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a https://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515 https://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b https://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691 https://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1 https://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd https://www.cve.org/CVERecord?id=CVE-2021-47337 https://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47337-4863@gregkh/ https://git.kernel.org/linus/93aa71ad7379900e61c8adff6a710a4c18c7c99b https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=ea518b70ed5e4598c8d706f37fc16f7b06e440bd https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4

CWE

CWE-476

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 5.13 \u0434\u043e 5.13.3 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.9.273 \u0434\u043e 4.9.275 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.14.237 \u0434\u043e 4.14.239 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.19.195 \u0434\u043e 4.19.197 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.4.126 \u0434\u043e 5.4.133 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.10.44 \u0434\u043e 5.10.51 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.12.11 \u0434\u043e 5.12.18 \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\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/887bfae2732b5b02a86a859fd239d34f7ff93c05\nhttps://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92\nhttps://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a\nhttps://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515\nhttps://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b\nhttps://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691\nhttps://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1\nhttps://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd\nhttps://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47337-4863@gregkh/\nhttps://git.kernel.org/linus/93aa71ad7379900e61c8adff6a710a4c18c7c99b\nhttps://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1\u0026id=ea518b70ed5e4598c8d706f37fc16f7b06e440bd\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "12.07.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "23.06.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "23.06.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-07402",
  "\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-2021-47337",
  "\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 5.13 \u0434\u043e 5.13.3 \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 4.9.273 \u0434\u043e 4.9.275 \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 4.14.237 \u0434\u043e 4.14.239 \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 4.19.195 \u0434\u043e 4.19.197 \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 5.4.126 \u0434\u043e 5.4.133 \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 5.10.44 \u0434\u043e 5.10.51 \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 5.12.11 \u0434\u043e 5.12.18 \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 scsi_host_alloc() \u043c\u043e\u0434\u0443\u043b\u044f drivers/scsi/hosts.c - \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 SCSI \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": "\u0420\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f NULL (CWE-476)",
  "\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 scsi_host_alloc() \u043c\u043e\u0434\u0443\u043b\u044f drivers/scsi/hosts.c - \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 SCSI \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 \u0440\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f NULL. \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 \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://git.kernel.org/stable/c/887bfae2732b5b02a86a859fd239d34f7ff93c05\nhttps://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92\nhttps://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a\nhttps://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515\nhttps://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b\nhttps://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691\nhttps://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1\nhttps://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd\nhttps://www.cve.org/CVERecord?id=CVE-2021-47337\nhttps://lore.kernel.org/linux-cve-announce/2024052136-CVE-2021-47337-4863@gregkh/\nhttps://git.kernel.org/linus/93aa71ad7379900e61c8adff6a710a4c18c7c99b\nhttps://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1\u0026id=ea518b70ed5e4598c8d706f37fc16f7b06e440bd\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
  "\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-476",
  "\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-2021-47337 (GCVE-0-2021-47337)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2025-05-04 07:08

Title

scsi: core: Fix bad pointer dereference when ehandler kthread is invalid

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid Commit 66a834d09293 ("scsi: core: Fix error handling of scsi_host_alloc()") changed the allocation logic to call put_device() to perform host cleanup with the assumption that IDA removal and stopping the kthread would properly be performed in scsi_host_dev_release(). However, in the unlikely case that the error handler thread fails to spawn, shost->ehandler is set to ERR_PTR(-ENOMEM). The error handler cleanup code in scsi_host_dev_release() will call kthread_stop() if shost->ehandler != NULL which will always be the case whether the kthread was successfully spawned or not. In the case that it failed to spawn this has the nasty side effect of trying to dereference an invalid pointer when kthread_stop() is called. The following splat provides an example of this behavior in the wild: scsi host11: error handler thread failed to spawn, error = -4 Kernel attempted to read user page (10c) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x0000010c Faulting instruction address: 0xc00000000818e9a8 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Modules linked in: ibmvscsi(+) scsi_transport_srp dm_multipath dm_mirror dm_region hash dm_log dm_mod fuse overlay squashfs loop CPU: 12 PID: 274 Comm: systemd-udevd Not tainted 5.13.0-rc7 #1 NIP: c00000000818e9a8 LR: c0000000089846e8 CTR: 0000000000007ee8 REGS: c000000037d12ea0 TRAP: 0300 Not tainted (5.13.0-rc7) MSR: 800000000280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 28228228 XER: 20040001 CFAR: c0000000089846e4 DAR: 000000000000010c DSISR: 40000000 IRQMASK: 0 GPR00: c0000000089846e8 c000000037d13140 c000000009cc1100 fffffffffffffffc GPR04: 0000000000000001 0000000000000000 0000000000000000 c000000037dc0000 GPR08: 0000000000000000 c000000037dc0000 0000000000000001 00000000fffff7ff GPR12: 0000000000008000 c00000000a049000 c000000037d13d00 000000011134d5a0 GPR16: 0000000000001740 c0080000190d0000 c0080000190d1740 c000000009129288 GPR20: c000000037d13bc0 0000000000000001 c000000037d13bc0 c0080000190b7898 GPR24: c0080000190b7708 0000000000000000 c000000033bb2c48 0000000000000000 GPR28: c000000046b28280 0000000000000000 000000000000010c fffffffffffffffc NIP [c00000000818e9a8] kthread_stop+0x38/0x230 LR [c0000000089846e8] scsi_host_dev_release+0x98/0x160 Call Trace: [c000000033bb2c48] 0xc000000033bb2c48 (unreliable) [c0000000089846e8] scsi_host_dev_release+0x98/0x160 [c00000000891e960] device_release+0x60/0x100 [c0000000087e55c4] kobject_release+0x84/0x210 [c00000000891ec78] put_device+0x28/0x40 [c000000008984ea4] scsi_host_alloc+0x314/0x430 [c0080000190b38bc] ibmvscsi_probe+0x54/0xad0 [ibmvscsi] [c000000008110104] vio_bus_probe+0xa4/0x4b0 [c00000000892a860] really_probe+0x140/0x680 [c00000000892aefc] driver_probe_device+0x15c/0x200 [c00000000892b63c] device_driver_attach+0xcc/0xe0 [c00000000892b740] __driver_attach+0xf0/0x200 [c000000008926f28] bus_for_each_dev+0xa8/0x130 [c000000008929ce4] driver_attach+0x34/0x50 [c000000008928fc0] bus_add_driver+0x1b0/0x300 [c00000000892c798] driver_register+0x98/0x1a0 [c00000000810eb60] __vio_register_driver+0x80/0xe0 [c0080000190b4a30] ibmvscsi_module_init+0x9c/0xdc [ibmvscsi] [c0000000080121d0] do_one_initcall+0x60/0x2d0 [c000000008261abc] do_init_module+0x7c/0x320 [c000000008265700] load_module+0x2350/0x25b0 [c000000008265cb4] __do_sys_finit_module+0xd4/0x160 [c000000008031110] system_call_exception+0x150/0x2d0 [c00000000800d35c] system_call_common+0xec/0x278 Fix this be nulling shost->ehandler when the kthread fails to spawn.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d2f0b960d07e52bb6…
	https://git.kernel.org/stable/c/f3d0a109240c9bed5…
	https://git.kernel.org/stable/c/e1bd3fac2baa3d5c0…
	https://git.kernel.org/stable/c/887bfae2732b5b02a…
	https://git.kernel.org/stable/c/ea518b70ed5e4598c…
	https://git.kernel.org/stable/c/8e4212ecf0713dd57…
	https://git.kernel.org/stable/c/c1671d2d2ef8a8483…
	https://git.kernel.org/stable/c/93aa71ad7379900e6…

Impacted products

Vendor

Product

Version

Linux

Affected: 8958181c1663e24a13434448e7d6b96b5d04900a , < d2f0b960d07e52bb664471b4de0ed8b08c636b3a (git)
Affected: db08ce595dd64ea9859f7d088b51cbfc8e685c66 , < f3d0a109240c9bed5c60d819014786be3a2fe515 (git)
Affected: 2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a , < e1bd3fac2baa3d5c04375980c1d5263a3335af92 (git)
Affected: 79296e292d67fa7b5fb8d8c27343683e823872c8 , < 887bfae2732b5b02a86a859fd239d34f7ff93c05 (git)
Affected: 7a696ce1d5d16a33a6cd6400bbcc0339b2460e11 , < ea518b70ed5e4598c8d706f37fc16f7b06e440bd (git)
Affected: 45d83db4728127944b237c0c8248987df9d478e7 , < 8e4212ecf0713dd57d0e3209a66201da582149b1 (git)
Affected: 66a834d092930cf41d809c0e989b13cd6f9ca006 , < c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691 (git)
Affected: 66a834d092930cf41d809c0e989b13cd6f9ca006 , < 93aa71ad7379900e61c8adff6a710a4c18c7c99b (git)

Linux

Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 4.9.276 , ≤ 4.9.* (semver)
Unaffected: 4.14.240 , ≤ 4.14.* (semver)
Unaffected: 4.19.198 , ≤ 4.19.* (semver)
Unaffected: 5.4.134 , ≤ 5.4.* (semver)
Unaffected: 5.10.52 , ≤ 5.10.* (semver)
Unaffected: 5.12.19 , ≤ 5.12.* (semver)
Unaffected: 5.13.4 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)

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              "status": "unaffected",
              "version": "5.10.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.276",
                  "versionStartIncluding": "4.9.273",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.240",
                  "versionStartIncluding": "4.14.237",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.198",
                  "versionStartIncluding": "4.19.195",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.134",
                  "versionStartIncluding": "5.4.126",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.52",
                  "versionStartIncluding": "5.10.44",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.19",
                  "versionStartIncluding": "5.12.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13.4",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Fix bad pointer dereference when ehandler kthread is invalid\n\nCommit 66a834d09293 (\"scsi: core: Fix error handling of scsi_host_alloc()\")\nchanged the allocation logic to call put_device() to perform host cleanup\nwith the assumption that IDA removal and stopping the kthread would\nproperly be performed in scsi_host_dev_release(). However, in the unlikely\ncase that the error handler thread fails to spawn, shost-\u003eehandler is set\nto ERR_PTR(-ENOMEM).\n\nThe error handler cleanup code in scsi_host_dev_release() will call\nkthread_stop() if shost-\u003eehandler != NULL which will always be the case\nwhether the kthread was successfully spawned or not. In the case that it\nfailed to spawn this has the nasty side effect of trying to dereference an\ninvalid pointer when kthread_stop() is called. The following splat provides\nan example of this behavior in the wild:\n\nscsi host11: error handler thread failed to spawn, error = -4\nKernel attempted to read user page (10c) - exploit attempt? (uid: 0)\nBUG: Kernel NULL pointer dereference on read at 0x0000010c\nFaulting instruction address: 0xc00000000818e9a8\nOops: Kernel access of bad area, sig: 11 [#1]\nLE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\nModules linked in: ibmvscsi(+) scsi_transport_srp dm_multipath dm_mirror dm_region\n hash dm_log dm_mod fuse overlay squashfs loop\nCPU: 12 PID: 274 Comm: systemd-udevd Not tainted 5.13.0-rc7 #1\nNIP:  c00000000818e9a8 LR: c0000000089846e8 CTR: 0000000000007ee8\nREGS: c000000037d12ea0 TRAP: 0300   Not tainted  (5.13.0-rc7)\nMSR:  800000000280b033 \u0026lt;SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE\u0026gt;  CR: 28228228\nXER: 20040001\nCFAR: c0000000089846e4 DAR: 000000000000010c DSISR: 40000000 IRQMASK: 0\nGPR00: c0000000089846e8 c000000037d13140 c000000009cc1100 fffffffffffffffc\nGPR04: 0000000000000001 0000000000000000 0000000000000000 c000000037dc0000\nGPR08: 0000000000000000 c000000037dc0000 0000000000000001 00000000fffff7ff\nGPR12: 0000000000008000 c00000000a049000 c000000037d13d00 000000011134d5a0\nGPR16: 0000000000001740 c0080000190d0000 c0080000190d1740 c000000009129288\nGPR20: c000000037d13bc0 0000000000000001 c000000037d13bc0 c0080000190b7898\nGPR24: c0080000190b7708 0000000000000000 c000000033bb2c48 0000000000000000\nGPR28: c000000046b28280 0000000000000000 000000000000010c fffffffffffffffc\nNIP [c00000000818e9a8] kthread_stop+0x38/0x230\nLR [c0000000089846e8] scsi_host_dev_release+0x98/0x160\nCall Trace:\n[c000000033bb2c48] 0xc000000033bb2c48 (unreliable)\n[c0000000089846e8] scsi_host_dev_release+0x98/0x160\n[c00000000891e960] device_release+0x60/0x100\n[c0000000087e55c4] kobject_release+0x84/0x210\n[c00000000891ec78] put_device+0x28/0x40\n[c000000008984ea4] scsi_host_alloc+0x314/0x430\n[c0080000190b38bc] ibmvscsi_probe+0x54/0xad0 [ibmvscsi]\n[c000000008110104] vio_bus_probe+0xa4/0x4b0\n[c00000000892a860] really_probe+0x140/0x680\n[c00000000892aefc] driver_probe_device+0x15c/0x200\n[c00000000892b63c] device_driver_attach+0xcc/0xe0\n[c00000000892b740] __driver_attach+0xf0/0x200\n[c000000008926f28] bus_for_each_dev+0xa8/0x130\n[c000000008929ce4] driver_attach+0x34/0x50\n[c000000008928fc0] bus_add_driver+0x1b0/0x300\n[c00000000892c798] driver_register+0x98/0x1a0\n[c00000000810eb60] __vio_register_driver+0x80/0xe0\n[c0080000190b4a30] ibmvscsi_module_init+0x9c/0xdc [ibmvscsi]\n[c0000000080121d0] do_one_initcall+0x60/0x2d0\n[c000000008261abc] do_init_module+0x7c/0x320\n[c000000008265700] load_module+0x2350/0x25b0\n[c000000008265cb4] __do_sys_finit_module+0xd4/0x160\n[c000000008031110] system_call_exception+0x150/0x2d0\n[c00000000800d35c] system_call_common+0xec/0x278\n\nFix this be nulling shost-\u003eehandler when the kthread fails to spawn."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:08:54.422Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d2f0b960d07e52bb664471b4de0ed8b08c636b3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3d0a109240c9bed5c60d819014786be3a2fe515"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1bd3fac2baa3d5c04375980c1d5263a3335af92"
        },
        {
          "url": "https://git.kernel.org/stable/c/887bfae2732b5b02a86a859fd239d34f7ff93c05"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea518b70ed5e4598c8d706f37fc16f7b06e440bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e4212ecf0713dd57d0e3209a66201da582149b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1671d2d2ef8a84837eea1b4d99ca0c6a66fb691"
        },
        {
          "url": "https://git.kernel.org/stable/c/93aa71ad7379900e61c8adff6a710a4c18c7c99b"
        }
      ],
      "title": "scsi: core: Fix bad pointer dereference when ehandler kthread is invalid",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47337",
    "datePublished": "2024-05-21T14:35:46.379Z",
    "dateReserved": "2024-05-21T14:28:16.978Z",
    "dateUpdated": "2025-05-04T07:08:54.422Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

BDU:2025-07402

CVE-2021-47337 (GCVE-0-2021-47337)

Tags

Sightings

Nomenclature