Vulnerability-Lookup

BDU:2025-09244 (CVE-2025-38373)

Vulnerability from fstec – Published: 2025-07-31 – Updated: 2025-11-26 – View on bdu.fstec.ru Fixed

Title

Уязвимость модуля drivers/infiniband/hw/mlx5/mr.c ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость модуля drivers/infiniband/hw/mlx5/mr.c ядра операционных систем Linux связана с некорректной блокировкой ресурсов. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

6.0 (Medium) CVSS 2.0


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

7.0 (High) CVSS 3.1


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-667 - Недостаточная блокировка

Aliases

CVE-2025-38373

References

6 references

URL
https://lore.kernel.org/linux-cve-announce/2025072503-CVE-2025-38373-b6fa@gregkh/
https://git.kernel.org/stable/c/2ed25aa7f7711f508b6120e336f05cd9d49943c0
https://git.kernel.org/stable/c/727eb1be65a370572edf307558ec3396b8573156
https://git.kernel.org/stable/c/beb89ada5715e7bd1518c58863eedce89ec051a7
https://access.redhat.com/security/cve/CVE-2025-38373
https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18

Impacted products

2 products from 2 vendors

Vendors

ООО «РусБИТех-Астра», Сообщество свободного программного обеспечения

Products

Astra Linux Special Edition (запись в едином реестре российских программ №369), Linux

Versions

1.8 (Astra Linux Special Edition), 6.13.3 (Linux), от 6.16 до 6.16 rc5 (Linux), от 6.14 до 6.15.6 (Linux), от 6.12.14 до 6.12.37 (Linux)

Product types

Operating system

Platforms

ООО «РусБИТех-Астра» Astra Linux Special Edition 1.8 (запись в едином реестре российских программ №369), Сообщество свободного программного обеспечения Linux 6.13.3, Сообщество свободного программного обеспечения Linux от 6.16 до 6.16 rc5, Сообщество свободного программного обеспечения Linux от 6.14 до 6.15.6, Сообщество свободного программного обеспечения Linux от 6.12.14 до 6.12.37

Mitigations

Использование рекомендаций: Для Linux: https://lore.kernel.org/linux-cve-announce/2025072503-CVE-2025-38373-b6fa@gregkh/ https://git.kernel.org/stable/c/2ed25aa7f7711f508b6120e336f05cd9d49943c0 https://git.kernel.org/stable/c/727eb1be65a370572edf307558ec3396b8573156 https://git.kernel.org/stable/c/beb89ada5715e7bd1518c58863eedce89ec051a7 Компенсирующие меры: 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. Для ОС Astra Linux: обновить пакет linux-6.12 до 6.12.47-1.astra1+ci8 или более высокой версии, используя рекомендации производителя: https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:H/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:H/PR:L/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": "\u041e\u041e\u041e \u00ab\u0420\u0443\u0441\u0411\u0418\u0422\u0435\u0445-\u0410\u0441\u0442\u0440\u0430\u00bb, \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": "1.8 (Astra Linux Special Edition), 6.13.3 (Linux), \u043e\u0442 6.16 \u0434\u043e 6.16 rc5 (Linux), \u043e\u0442 6.14 \u0434\u043e 6.15.6 (Linux), \u043e\u0442 6.12.14 \u0434\u043e 6.12.37 (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://lore.kernel.org/linux-cve-announce/2025072503-CVE-2025-38373-b6fa@gregkh/\nhttps://git.kernel.org/stable/c/2ed25aa7f7711f508b6120e336f05cd9d49943c0 \nhttps://git.kernel.org/stable/c/727eb1be65a370572edf307558ec3396b8573156  \nhttps://git.kernel.org/stable/c/beb89ada5715e7bd1518c58863eedce89ec051a7\n\n\u041a\u043e\u043c\u043f\u0435\u043d\u0441\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043c\u0435\u0440\u044b:\n\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\u0414\u043b\u044f \u041e\u0421 Astra Linux:\n\u043e\u0431\u043d\u043e\u0432\u0438\u0442\u044c \u043f\u0430\u043a\u0435\u0442 linux-6.12 \u0434\u043e 6.12.47-1.astra1+ci8 \u0438\u043b\u0438 \u0431\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f: https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "16.06.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "26.11.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "31.07.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-09244",
  "\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-2025-38373",
  "\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": "Astra Linux Special Edition (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u2116369), 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": "\u041e\u041e\u041e \u00ab\u0420\u0443\u0441\u0411\u0418\u0422\u0435\u0445-\u0410\u0441\u0442\u0440\u0430\u00bb Astra Linux Special Edition 1.8  (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u2116369), \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 6.13.3 , \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 6.16 \u0434\u043e 6.16 rc5 , \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 6.14 \u0434\u043e 6.15.6 , \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 6.12.14 \u0434\u043e 6.12.37 ",
  "\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 \u043c\u043e\u0434\u0443\u043b\u044f drivers/infiniband/hw/mlx5/mr.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c 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 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0430 (CWE-667)",
  "\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 \u043c\u043e\u0434\u0443\u043b\u044f drivers/infiniband/hw/mlx5/mr.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u043e\u0439 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432. \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://lore.kernel.org/linux-cve-announce/2025072503-CVE-2025-38373-b6fa@gregkh/\nhttps://git.kernel.org/stable/c/2ed25aa7f7711f508b6120e336f05cd9d49943c0 \nhttps://git.kernel.org/stable/c/727eb1be65a370572edf307558ec3396b8573156  \nhttps://git.kernel.org/stable/c/beb89ada5715e7bd1518c58863eedce89ec051a7\nhttps://access.redhat.com/security/cve/CVE-2025-38373\nhttps://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18",
  "\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-667",
  "\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 6)\n\u0412\u044b\u0441\u043e\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 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7)"
}

CVE-2025-38373 (GCVE-0-2025-38373)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-05-23 15:59

Title

IB/mlx5: Fix potential deadlock in MR deregistration

Summary

In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix potential deadlock in MR deregistration The issue arises when kzalloc() is invoked while holding umem_mutex or any other lock acquired under umem_mutex. This is problematic because kzalloc() can trigger fs_reclaim_aqcuire(), which may, in turn, invoke mmu_notifier_invalidate_range_start(). This function can lead to mlx5_ib_invalidate_range(), which attempts to acquire umem_mutex again, resulting in a deadlock. The problematic flow: CPU0 | CPU1 ---------------------------------------|------------------------------------------------ mlx5_ib_dereg_mr() | → revoke_mr() | → mutex_lock(&umem_odp->umem_mutex) | | mlx5_mkey_cache_init() | → mutex_lock(&dev->cache.rb_lock) | → mlx5r_cache_create_ent_locked() | → kzalloc(GFP_KERNEL) | → fs_reclaim() | → mmu_notifier_invalidate_range_start() | → mlx5_ib_invalidate_range() | → mutex_lock(&umem_odp->umem_mutex) → cache_ent_find_and_store() | → mutex_lock(&dev->cache.rb_lock) | Additionally, when kzalloc() is called from within cache_ent_find_and_store(), we encounter the same deadlock due to re-acquisition of umem_mutex. Solve by releasing umem_mutex in dereg_mr() after umr_revoke_mr() and before acquiring rb_lock. This ensures that we don't hold umem_mutex while performing memory allocations that could trigger the reclaim path. This change prevents the deadlock by ensuring proper lock ordering and avoiding holding locks during memory allocation operations that could trigger the reclaim path. The following lockdep warning demonstrates the deadlock: python3/20557 is trying to acquire lock: ffff888387542128 (&umem_odp->umem_mutex){+.+.}-{4:4}, at: mlx5_ib_invalidate_range+0x5b/0x550 [mlx5_ib] but task is already holding lock: ffffffff82f6b840 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: unmap_vmas+0x7b/0x1a0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}: fs_reclaim_acquire+0x60/0xd0 mem_cgroup_css_alloc+0x6f/0x9b0 cgroup_init_subsys+0xa4/0x240 cgroup_init+0x1c8/0x510 start_kernel+0x747/0x760 x86_64_start_reservations+0x25/0x30 x86_64_start_kernel+0x73/0x80 common_startup_64+0x129/0x138 -> #2 (fs_reclaim){+.+.}-{0:0}: fs_reclaim_acquire+0x91/0xd0 __kmalloc_cache_noprof+0x4d/0x4c0 mlx5r_cache_create_ent_locked+0x75/0x620 [mlx5_ib] mlx5_mkey_cache_init+0x186/0x360 [mlx5_ib] mlx5_ib_stage_post_ib_reg_umr_init+0x3c/0x60 [mlx5_ib] __mlx5_ib_add+0x4b/0x190 [mlx5_ib] mlx5r_probe+0xd9/0x320 [mlx5_ib] auxiliary_bus_probe+0x42/0x70 really_probe+0xdb/0x360 __driver_probe_device+0x8f/0x130 driver_probe_device+0x1f/0xb0 __driver_attach+0xd4/0x1f0 bus_for_each_dev+0x79/0xd0 bus_add_driver+0xf0/0x200 driver_register+0x6e/0xc0 __auxiliary_driver_register+0x6a/0xc0 do_one_initcall+0x5e/0x390 do_init_module+0x88/0x240 init_module_from_file+0x85/0xc0 idempotent_init_module+0x104/0x300 __x64_sys_finit_module+0x68/0xc0 do_syscall_64+0x6d/0x140 entry_SYSCALL_64_after_hwframe+0x4b/0x53 -> #1 (&dev->cache.rb_lock){+.+.}-{4:4}: __mutex_lock+0x98/0xf10 __mlx5_ib_dereg_mr+0x6f2/0x890 [mlx5_ib] mlx5_ib_dereg_mr+0x21/0x110 [mlx5_ib] ib_dereg_mr_user+0x85/0x1f0 [ib_core] ---truncated---

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/beb89ada5715e7bd1…
https://git.kernel.org/stable/c/727eb1be65a370572…
https://git.kernel.org/stable/c/2ed25aa7f7711f508…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b13d32786acabf70a7b04ed24b7468fc3c82977c , < beb89ada5715e7bd1518c58863eedce89ec051a7 (git) Affected: abb604a1a9c87255c7a6f3b784410a9707baf467 , < 727eb1be65a370572edf307558ec3396b8573156 (git) Affected: abb604a1a9c87255c7a6f3b784410a9707baf467 , < 2ed25aa7f7711f508b6120e336f05cd9d49943c0 (git) Affected: 5297f5ddffef47b94172ab0d3d62270002a3dcc1 (git) Affected: 6.12.14 , < 6.12.37 (semver) Affected: 6.13.3 , < 6.14 (semver)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.6 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/mr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "727eb1be65a370572edf307558ec3396b8573156",
              "status": "affected",
              "version": "abb604a1a9c87255c7a6f3b784410a9707baf467",
              "versionType": "git"
            },
            {
              "lessThan": "2ed25aa7f7711f508b6120e336f05cd9d49943c0",
              "status": "affected",
              "version": "abb604a1a9c87255c7a6f3b784410a9707baf467",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5297f5ddffef47b94172ab0d3d62270002a3dcc1",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.37",
              "status": "affected",
              "version": "6.12.14",
              "versionType": "semver"
            },
            {
              "lessThan": "6.14",
              "status": "affected",
              "version": "6.13.3",
              "versionType": "semver"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/mr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.37",
                  "versionStartIncluding": "6.12.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.6",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.13.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix potential deadlock in MR deregistration\n\nThe issue arises when kzalloc() is invoked while holding umem_mutex or\nany other lock acquired under umem_mutex. This is problematic because\nkzalloc() can trigger fs_reclaim_aqcuire(), which may, in turn, invoke\nmmu_notifier_invalidate_range_start(). This function can lead to\nmlx5_ib_invalidate_range(), which attempts to acquire umem_mutex again,\nresulting in a deadlock.\n\nThe problematic flow:\n             CPU0                      |              CPU1\n---------------------------------------|------------------------------------------------\nmlx5_ib_dereg_mr()                     |\n \u2192 revoke_mr()                         |\n   \u2192 mutex_lock(\u0026umem_odp-\u003eumem_mutex) |\n                                       | mlx5_mkey_cache_init()\n                                       |  \u2192 mutex_lock(\u0026dev-\u003ecache.rb_lock)\n                                       |  \u2192 mlx5r_cache_create_ent_locked()\n                                       |    \u2192 kzalloc(GFP_KERNEL)\n                                       |      \u2192 fs_reclaim()\n                                       |        \u2192 mmu_notifier_invalidate_range_start()\n                                       |          \u2192 mlx5_ib_invalidate_range()\n                                       |            \u2192 mutex_lock(\u0026umem_odp-\u003eumem_mutex)\n   \u2192 cache_ent_find_and_store()        |\n     \u2192 mutex_lock(\u0026dev-\u003ecache.rb_lock) |\n\nAdditionally, when kzalloc() is called from within\ncache_ent_find_and_store(), we encounter the same deadlock due to\nre-acquisition of umem_mutex.\n\nSolve by releasing umem_mutex in dereg_mr() after umr_revoke_mr()\nand before acquiring rb_lock. This ensures that we don\u0027t hold\numem_mutex while performing memory allocations that could trigger\nthe reclaim path.\n\nThis change prevents the deadlock by ensuring proper lock ordering and\navoiding holding locks during memory allocation operations that could\ntrigger the reclaim path.\n\nThe following lockdep warning demonstrates the deadlock:\n\n python3/20557 is trying to acquire lock:\n ffff888387542128 (\u0026umem_odp-\u003eumem_mutex){+.+.}-{4:4}, at:\n mlx5_ib_invalidate_range+0x5b/0x550 [mlx5_ib]\n\n but task is already holding lock:\n ffffffff82f6b840 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at:\n unmap_vmas+0x7b/0x1a0\n\n which lock already depends on the new lock.\n\n the existing dependency chain (in reverse order) is:\n\n -\u003e #3 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}:\n       fs_reclaim_acquire+0x60/0xd0\n       mem_cgroup_css_alloc+0x6f/0x9b0\n       cgroup_init_subsys+0xa4/0x240\n       cgroup_init+0x1c8/0x510\n       start_kernel+0x747/0x760\n       x86_64_start_reservations+0x25/0x30\n       x86_64_start_kernel+0x73/0x80\n       common_startup_64+0x129/0x138\n\n -\u003e #2 (fs_reclaim){+.+.}-{0:0}:\n       fs_reclaim_acquire+0x91/0xd0\n       __kmalloc_cache_noprof+0x4d/0x4c0\n       mlx5r_cache_create_ent_locked+0x75/0x620 [mlx5_ib]\n       mlx5_mkey_cache_init+0x186/0x360 [mlx5_ib]\n       mlx5_ib_stage_post_ib_reg_umr_init+0x3c/0x60 [mlx5_ib]\n       __mlx5_ib_add+0x4b/0x190 [mlx5_ib]\n       mlx5r_probe+0xd9/0x320 [mlx5_ib]\n       auxiliary_bus_probe+0x42/0x70\n       really_probe+0xdb/0x360\n       __driver_probe_device+0x8f/0x130\n       driver_probe_device+0x1f/0xb0\n       __driver_attach+0xd4/0x1f0\n       bus_for_each_dev+0x79/0xd0\n       bus_add_driver+0xf0/0x200\n       driver_register+0x6e/0xc0\n       __auxiliary_driver_register+0x6a/0xc0\n       do_one_initcall+0x5e/0x390\n       do_init_module+0x88/0x240\n       init_module_from_file+0x85/0xc0\n       idempotent_init_module+0x104/0x300\n       __x64_sys_finit_module+0x68/0xc0\n       do_syscall_64+0x6d/0x140\n       entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n -\u003e #1 (\u0026dev-\u003ecache.rb_lock){+.+.}-{4:4}:\n       __mutex_lock+0x98/0xf10\n       __mlx5_ib_dereg_mr+0x6f2/0x890 [mlx5_ib]\n       mlx5_ib_dereg_mr+0x21/0x110 [mlx5_ib]\n       ib_dereg_mr_user+0x85/0x1f0 [ib_core]\n  \n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:59:35.164Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/beb89ada5715e7bd1518c58863eedce89ec051a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/727eb1be65a370572edf307558ec3396b8573156"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ed25aa7f7711f508b6120e336f05cd9d49943c0"
        }
      ],
      "title": "IB/mlx5: Fix potential deadlock in MR deregistration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38373",
    "datePublished": "2025-07-25T12:53:16.082Z",
    "dateReserved": "2025-04-16T04:51:24.009Z",
    "dateUpdated": "2026-05-23T15:59:35.164Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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