Vulnerability-Lookup

BDU:2026-10422 (CVE-2023-53752)

Vulnerability from fstec – Published: 2026-07-23 – Updated: 2026-07-23 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции kmalloc_reserve() модуля net/core/skbuff.c поддержки сетевых функций ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функции kmalloc_reserve() модуля net/core/skbuff.c поддержки сетевых функций ядра операционной системы Linux связана с целочисленным переполнением или циклическим сдвигом. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

4.6 (Medium) CVSS 2.0


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

5.5 (Medium) CVSS 3.1


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-189 - Ошибки, возникающие при обработке чисел
CWE-190 - Целочисленное переполнение или циклический сдвиг

Aliases

CVE-2023-53752

References

10 references

URL
https://www.cve.org/CVERecord?id=CVE-2023-53752
https://git.kernel.org/stable/c/31cf7853a940181593e4472fc56f46574123f9f6
https://git.kernel.org/stable/c/e4ffc47a1c3e5d11a853aa178c9a5136e79412e9
https://git.kernel.org/stable/c/bf7da02d2b8faf324206e1cbe64a4813ff903cc1
https://git.kernel.org/linus/915d975b2ffa58a14bfcf16fafe00c41315949ff
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.54
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3
https://lore.kernel.org/linux-cve-announce/2025120843-CVE-2023-53752-339f@gregkh/
https://security-tracker.debian.org/tracker/CVE-2023-53752

Impacted products

2 products from 1 vendor

Vendors

Сообщество свободного программного обеспечения

Products

Debian GNU/Linux, Linux

Versions

12 (Debian GNU/Linux), от 6.2 до 6.4.15 включительно (Linux), от 6.5 до 6.5.2 включительно (Linux), от 6.1.31 до 6.1.53 включительно (Linux)

Product types

Operating system

Platforms

Сообщество свободного программного обеспечения Debian GNU/Linux 12, Сообщество свободного программного обеспечения Linux от 6.2 до 6.4.15 включительно, Сообщество свободного программного обеспечения Linux от 6.5 до 6.5.2 включительно, Сообщество свободного программного обеспечения Linux от 6.1.31 до 6.1.53 включительно

Mitigations

В условиях отсутствия обновлений безопасности от производителя рекомендуется придерживаться "Рекомендаций по безопасной настройке операционных систем LINUX", изложенных в методическом документе ФСТЭК России, утверждённом 25 декабря 2022 года. Использование рекомендаций: Для Linux: https://lore.kernel.org/linux-cve-announce/2025120843-CVE-2023-53752-339f@gregkh/ https://git.kernel.org/stable/c/31cf7853a940181593e4472fc56f46574123f9f6 https://git.kernel.org/stable/c/e4ffc47a1c3e5d11a853aa178c9a5136e79412e9 https://git.kernel.org/stable/c/bf7da02d2b8faf324206e1cbe64a4813ff903cc1 https://git.kernel.org/linus/915d975b2ffa58a14bfcf16fafe00c41315949ff https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.54 https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16 https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3 Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2023-53752

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": "12 (Debian GNU/Linux), \u043e\u0442 6.2 \u0434\u043e 6.4.15 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 6.5 \u0434\u043e 6.5.2 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 6.1.31 \u0434\u043e 6.1.53 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0412 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \"\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u043e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0439 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c LINUX\", \u0438\u0437\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u0432 \u043c\u0435\u0442\u043e\u0434\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u0424\u0421\u0422\u042d\u041a \u0420\u043e\u0441\u0441\u0438\u0438, \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d\u043d\u043e\u043c 25 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2022 \u0433\u043e\u0434\u0430.\n\n\n\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\n\u0414\u043b\u044f Linux:\nhttps://lore.kernel.org/linux-cve-announce/2025120843-CVE-2023-53752-339f@gregkh/\nhttps://git.kernel.org/stable/c/31cf7853a940181593e4472fc56f46574123f9f6\nhttps://git.kernel.org/stable/c/e4ffc47a1c3e5d11a853aa178c9a5136e79412e9\nhttps://git.kernel.org/stable/c/bf7da02d2b8faf324206e1cbe64a4813ff903cc1\nhttps://git.kernel.org/linus/915d975b2ffa58a14bfcf16fafe00c41315949ff\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.54\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2023-53752",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "31.08.2023",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "23.07.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "23.07.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-10422",
  "\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-2023-53752",
  "\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 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 6.2 \u0434\u043e 6.4.15 \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 6.5 \u0434\u043e 6.5.2 \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 6.1.31 \u0434\u043e 6.1.53 \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 kmalloc_reserve() \u043c\u043e\u0434\u0443\u043b\u044f net/core/skbuff.c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \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": "\u041e\u0448\u0438\u0431\u043a\u0438, \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0449\u0438\u0435 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0447\u0438\u0441\u0435\u043b (CWE-189), \u0426\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u0435 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0438\u043b\u0438 \u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0441\u0434\u0432\u0438\u0433 (CWE-190)",
  "\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 kmalloc_reserve() \u043c\u043e\u0434\u0443\u043b\u044f net/core/skbuff.c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \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 \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u043c \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u0438\u043b\u0438 \u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u0441\u0434\u0432\u0438\u0433\u043e\u043c. \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://www.cve.org/CVERecord?id=CVE-2023-53752\nhttps://git.kernel.org/stable/c/31cf7853a940181593e4472fc56f46574123f9f6\nhttps://git.kernel.org/stable/c/e4ffc47a1c3e5d11a853aa178c9a5136e79412e9\nhttps://git.kernel.org/stable/c/bf7da02d2b8faf324206e1cbe64a4813ff903cc1\nhttps://git.kernel.org/linus/915d975b2ffa58a14bfcf16fafe00c41315949ff\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.54\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3\nhttps://lore.kernel.org/linux-cve-announce/2025120843-CVE-2023-53752-339f@gregkh/\nhttps://security-tracker.debian.org/tracker/CVE-2023-53752",
  "\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-189, CWE-190",
  "\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-2023-53752 (GCVE-0-2023-53752)

Vulnerability from cvelistv5 – Published: 2025-12-08 01:19 – Updated: 2026-08-05 09:15

Title

net: deal with integer overflows in kmalloc_reserve()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: deal with integer overflows in kmalloc_reserve() Blamed commit changed: ptr = kmalloc(size); if (ptr) size = ksize(ptr); size = kmalloc_size_roundup(size); ptr = kmalloc(size); This allowed various crash as reported by syzbot [1] and Kyle Zeng. Problem is that if @size is bigger than 0x80000001, kmalloc_size_roundup(size) returns 2^32. kmalloc_reserve() uses a 32bit variable (obj_size), so 2^32 is truncated to 0. kmalloc(0) returns ZERO_SIZE_PTR which is not handled by skb allocations. Following trace can be triggered if a netdev->mtu is set close to 0x7fffffff We might in the future limit netdev->mtu to more sensible limit (like KMALLOC_MAX_SIZE). This patch is based on a syzbot report, and also a report and tentative fix from Kyle Zeng. [1] BUG: KASAN: user-memory-access in __build_skb_around net/core/skbuff.c:294 [inline] BUG: KASAN: user-memory-access in __alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527 Write of size 32 at addr 00000000fffffd10 by task syz-executor.4/22554 CPU: 1 PID: 22554 Comm: syz-executor.4 Not tainted 6.1.39-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:279 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:286 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x120/0x1a0 lib/dump_stack.c:106 print_report+0xe4/0x4b4 mm/kasan/report.c:398 kasan_report+0x150/0x1ac mm/kasan/report.c:495 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 memset+0x40/0x70 mm/kasan/shadow.c:44 __build_skb_around net/core/skbuff.c:294 [inline] __alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527 alloc_skb include/linux/skbuff.h:1316 [inline] igmpv3_newpack+0x104/0x1088 net/ipv4/igmp.c:359 add_grec+0x81c/0x1124 net/ipv4/igmp.c:534 igmpv3_send_cr net/ipv4/igmp.c:667 [inline] igmp_ifc_timer_expire+0x1b0/0x1008 net/ipv4/igmp.c:810 call_timer_fn+0x1c0/0x9f0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x54c/0x710 kernel/time/timer.c:1790 run_timer_softirq+0x28/0x4c kernel/time/timer.c:1803 _stext+0x380/0xfbc ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84 invoke_softirq kernel/softirq.c:437 [inline] __irq_exit_rcu+0x1c0/0x4cc kernel/softirq.c:683 irq_exit_rcu+0x14/0x78 kernel/softirq.c:695 el0_interrupt+0x7c/0x2e0 arch/arm64/kernel/entry-common.c:717 __el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:724 el0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:729 el0t_64_irq+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/31cf7853a94018159…
https://git.kernel.org/stable/c/e4ffc47a1c3e5d11a…
https://git.kernel.org/stable/c/bf7da02d2b8faf324…
https://git.kernel.org/stable/c/915d975b2ffa58a14…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0dbc898f5917c5a3bec6be19d9f5469cbc351a7d , < 31cf7853a940181593e4472fc56f46574123f9f6 (git) Affected: 12d6c1d3a2ad0c199ec57c201cdc71e8e157a232 , < e4ffc47a1c3e5d11a853aa178c9a5136e79412e9 (git) Affected: 12d6c1d3a2ad0c199ec57c201cdc71e8e157a232 , < bf7da02d2b8faf324206e1cbe64a4813ff903cc1 (git) Affected: 12d6c1d3a2ad0c199ec57c201cdc71e8e157a232 , < 915d975b2ffa58a14bfcf16fafe00c41315949ff (git) Affected: 6.1.31 , < 6.1.54 (semver)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.1.54 , ≤ 6.1.* (semver) Unaffected: 6.4.16 , ≤ 6.4.* (semver) Unaffected: 6.5.3 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/skbuff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "31cf7853a940181593e4472fc56f46574123f9f6",
              "status": "affected",
              "version": "0dbc898f5917c5a3bec6be19d9f5469cbc351a7d",
              "versionType": "git"
            },
            {
              "lessThan": "e4ffc47a1c3e5d11a853aa178c9a5136e79412e9",
              "status": "affected",
              "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232",
              "versionType": "git"
            },
            {
              "lessThan": "915d975b2ffa58a14bfcf16fafe00c41315949ff",
              "status": "affected",
              "version": "12d6c1d3a2ad0c199ec57c201cdc71e8e157a232",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.54",
              "status": "affected",
              "version": "6.1.31",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/skbuff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.54",
                  "versionStartIncluding": "6.1.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.16",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.3",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: deal with integer overflows in kmalloc_reserve()\n\nBlamed commit changed:\n    ptr = kmalloc(size);\n    if (ptr)\n      size = ksize(ptr);\n\n    size = kmalloc_size_roundup(size);\n    ptr = kmalloc(size);\n\nThis allowed various crash as reported by syzbot [1]\nand Kyle Zeng.\n\nProblem is that if @size is bigger than 0x80000001,\nkmalloc_size_roundup(size) returns 2^32.\n\nkmalloc_reserve() uses a 32bit variable (obj_size),\nso 2^32 is truncated to 0.\n\nkmalloc(0) returns ZERO_SIZE_PTR which is not handled by\nskb allocations.\n\nFollowing trace can be triggered if a netdev-\u003emtu is set\nclose to 0x7fffffff\n\nWe might in the future limit netdev-\u003emtu to more sensible\nlimit (like KMALLOC_MAX_SIZE).\n\nThis patch is based on a syzbot report, and also a report\nand tentative fix from Kyle Zeng.\n\n[1]\nBUG: KASAN: user-memory-access in __build_skb_around net/core/skbuff.c:294 [inline]\nBUG: KASAN: user-memory-access in __alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527\nWrite of size 32 at addr 00000000fffffd10 by task syz-executor.4/22554\n\nCPU: 1 PID: 22554 Comm: syz-executor.4 Not tainted 6.1.39-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023\nCall trace:\ndump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:279\nshow_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:286\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0x120/0x1a0 lib/dump_stack.c:106\nprint_report+0xe4/0x4b4 mm/kasan/report.c:398\nkasan_report+0x150/0x1ac mm/kasan/report.c:495\nkasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189\nmemset+0x40/0x70 mm/kasan/shadow.c:44\n__build_skb_around net/core/skbuff.c:294 [inline]\n__alloc_skb+0x3c4/0x6e8 net/core/skbuff.c:527\nalloc_skb include/linux/skbuff.h:1316 [inline]\nigmpv3_newpack+0x104/0x1088 net/ipv4/igmp.c:359\nadd_grec+0x81c/0x1124 net/ipv4/igmp.c:534\nigmpv3_send_cr net/ipv4/igmp.c:667 [inline]\nigmp_ifc_timer_expire+0x1b0/0x1008 net/ipv4/igmp.c:810\ncall_timer_fn+0x1c0/0x9f0 kernel/time/timer.c:1474\nexpire_timers kernel/time/timer.c:1519 [inline]\n__run_timers+0x54c/0x710 kernel/time/timer.c:1790\nrun_timer_softirq+0x28/0x4c kernel/time/timer.c:1803\n_stext+0x380/0xfbc\n____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79\ncall_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891\ndo_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84\ninvoke_softirq kernel/softirq.c:437 [inline]\n__irq_exit_rcu+0x1c0/0x4cc kernel/softirq.c:683\nirq_exit_rcu+0x14/0x78 kernel/softirq.c:695\nel0_interrupt+0x7c/0x2e0 arch/arm64/kernel/entry-common.c:717\n__el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:724\nel0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:729\nel0t_64_irq+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Triggering the overflow requires a locally-configured netdev MTU near 0x7fffffff (set via rtnetlink/ioctl) plus a local socket joining a multicast group; no remote peer can induce a \u003e2GB skb allocation. The vulnerable code is thus reached only through local syscalls.\nAC:L - The overflow is fully deterministic \u2014 kmalloc(0) always returns ZERO_SIZE_PTR with no memory pressure or timing dependency, so every IGMP/MLD report on the oversized-MTU device corrupts memory. No race, memory-layout guess, or condition outside attacker control is involved.\nPR:L - Setting a huge MTU needs CAP_NET_ADMIN, but an unprivileged user obtains it over their own netns via `unshare -Urn`, and the always-present `lo` device has no max_mtu cap \u2014 verified working on a current kernel. Joining the multicast group that arms the IGMP timer needs no privileges at all.\nUI:N - The attacker performs every step themselves \u2014 namespace creation, MTU configuration, and the multicast join that arms the IGMP timer. No victim action is required.\nS:U - The corruption occurs within the kernel\u0027s own memory-management and skb handling, the same security authority as the vulnerable component. No VM, IOMMU, or hypervisor boundary is crossed.\nC:H - The skb is built with head=ZERO_SIZE_PTR and a ~4GB end offset, so skb_shared_info and packet data land at low, user-mappable addresses; on systems without SMAP/PAN (ARM/embedded/older x86, as in the arm64 syzbot report where the access actually reached user memory) the attacker can pre-map that page and have the kernel populate attacker-readable memory, and the resulting control over shinfo-\u003efrags gives an arbitrary kernel read primitive.\nI:H - This is an unbounded wild-write: the kernel memsets and then writes packet contents through a bogus head pointer at attacker-influenced offsets, and if skb_shared_info is placed in attacker-mapped memory the kernel dereferences attacker-controlled nr_frags/frags[]/frag_list/destructor_arg, yielding an arbitrary write and control-flow hijack primitive.\nA:H - In the common case the wild write hits an unmapped or SMAP-protected address from softirq (timer) context, producing an immediate kernel oops/panic as shown in the syzbot KASAN report. The crash is reliably reproducible by any local unprivileged user."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:48.993Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/31cf7853a940181593e4472fc56f46574123f9f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4ffc47a1c3e5d11a853aa178c9a5136e79412e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf7da02d2b8faf324206e1cbe64a4813ff903cc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/915d975b2ffa58a14bfcf16fafe00c41315949ff"
        }
      ],
      "title": "net: deal with integer overflows in kmalloc_reserve()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53752",
    "datePublished": "2025-12-08T01:19:12.407Z",
    "dateReserved": "2025-12-08T01:18:04.279Z",
    "dateUpdated": "2026-08-05T09:15:48.993Z",
    "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.

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.