Vulnerability-Lookup

BDU:2024-06345

Vulnerability from fstec - Published: 21.12.2021

Title

Уязвимость функции async_free_space() в компоненте binder ядра операционной системы Linux, позволяющая нарушителю раскрыть защищаемую информацию

Description

Уязвимость функции async_free_space() в компоненте binder ядра операционной системы Linux связана с утечкой до 8 байт при каждой асинхронной транзакции размером 8 байт или меньше. Эксплуатация уязвимости может позволить нарушителю раскрыть защищаемую информацию

Severity ?


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

Vendor

ООО «РусБИТех-Астра», ООО «Ред Софт», Сообщество свободного программного обеспечения

Software Name

Astra Linux Special Edition для «Эльбрус» (запись в едином реестре российских программ №11156), РЕД ОС (запись в едином реестре российских программ №3751), Linux

Software Version

8.1 «Ленинград» (Astra Linux Special Edition для «Эльбрус»), 7.3 (РЕД ОС), от 5.5 до 5.10.89 включительно (Linux), от 5.11 до 5.15.12 включительно (Linux), от 4.15 до 4.19.223 включительно (Linux), от 4.20 до 5.4.169 включительно (Linux), от 4.14 до 4.14.260 включительно (Linux)

Possible Mitigations

Для Linux: https://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da https://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff https://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4 https://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495 https://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593 https://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901 Для РедОС: http://repo.red-soft.ru/redos/7.3c/x86_64/updates/ Для ОС Astra Linux: использование рекомендаций производителя: https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81

Reference

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46935 https://git.kernel.org/linus/cfd0d84ba28c18b531648c9d4a35ecca89ad9901 https://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da https://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff https://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4 https://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495 https://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593 https://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.261 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.224 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.90 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.13 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.170 https://lore.kernel.org/linux-cve-announce/2024022751-CVE-2021-46935-f8f4@gregkh/ https://lore.kernel.org/linux-cve-announce/2024022751-CVE-2021-46935-f8f4@gregkh/T/#u https://redos.red-soft.ru/support/secure/ https://www.cve.org/CVERecord?id=CVE-2021-46935 https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81

CWE

CWE-668

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:C/I:N/A:N",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
  "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, \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\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": "8.1 \u00ab\u041b\u0435\u043d\u0438\u043d\u0433\u0440\u0430\u0434\u00bb (Astra Linux Special Edition \u0434\u043b\u044f \u00ab\u042d\u043b\u044c\u0431\u0440\u0443\u0441\u00bb), 7.3 (\u0420\u0415\u0414 \u041e\u0421), \u043e\u0442 5.5 \u0434\u043e 5.10.89 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.15.12 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.223 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.169 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.14 \u0434\u043e 4.14.260 \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": "\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da \nhttps://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff \nhttps://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4 \nhttps://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495 \nhttps://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593 \nhttps://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901\n\n\u0414\u043b\u044f \u0420\u0435\u0434\u041e\u0421: http://repo.red-soft.ru/redos/7.3c/x86_64/updates/\n\n\u0414\u043b\u044f \u041e\u0421 Astra Linux:\n\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f: https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "21.12.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "29.01.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "21.08.2024",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2024-06345",
  "\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-2021-46935",
  "\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 \u0434\u043b\u044f \u00ab\u042d\u043b\u044c\u0431\u0440\u0443\u0441\u00bb (\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 \u211611156), \u0420\u0415\u0414 \u041e\u0421 (\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 \u21163751), 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 \u0434\u043b\u044f \u00ab\u042d\u043b\u044c\u0431\u0440\u0443\u0441\u00bb 8.1 \u00ab\u041b\u0435\u043d\u0438\u043d\u0433\u0440\u0430\u0434\u00bb  (\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 \u211611156), \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\u00bb \u0420\u0415\u0414 \u041e\u0421 7.3  (\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 \u21163751), \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.20.0 \u0434\u043e 5.4.170 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.11.0 \u0434\u043e 5.15.13 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.5.0 \u0434\u043e 5.10.90 , \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 4.14.0 \u0434\u043e 4.14.261 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.15.0 \u0434\u043e 4.19.224 ",
  "\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 async_free_space() \u0432 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0435 binder \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 \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u0443\u044e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e",
  "\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\u0441\u043a\u0440\u044b\u0442\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430 \u0434\u043b\u044f \u043e\u0448\u0438\u0431\u043e\u0447\u043d\u043e\u0439 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 (CWE-668)",
  "\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 async_free_space() \u0432 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0435 binder \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 \u0443\u0442\u0435\u0447\u043a\u043e\u0439 \u0434\u043e 8 \u0431\u0430\u0439\u0442 \u043f\u0440\u0438 \u043a\u0430\u0436\u0434\u043e\u0439 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0439 \u0442\u0440\u0430\u043d\u0437\u0430\u043a\u0446\u0438\u0438 \u0440\u0430\u0437\u043c\u0435\u0440\u043e\u043c 8 \u0431\u0430\u0439\u0442 \u0438\u043b\u0438 \u043c\u0435\u043d\u044c\u0448\u0435. \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 \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u0443\u044e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e",
  "\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",
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  "\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": "\u041d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438, \u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46935\nhttps://git.kernel.org/linus/cfd0d84ba28c18b531648c9d4a35ecca89ad9901\nhttps://git.kernel.org/stable/c/103b16a8c51f96d5fe063022869ea906c256e5da\nhttps://git.kernel.org/stable/c/17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff\nhttps://git.kernel.org/stable/c/1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4\nhttps://git.kernel.org/stable/c/2d2df539d05205fd83c404d5f2dff48d36f9b495\nhttps://git.kernel.org/stable/c/7c7064402609aeb6fb11be1b4ec10673ff17b593\nhttps://git.kernel.org/stable/c/cfd0d84ba28c18b531648c9d4a35ecca89ad9901\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.261\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.224\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.90\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.13\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.170\nhttps://lore.kernel.org/linux-cve-announce/2024022751-CVE-2021-46935-f8f4@gregkh/\nhttps://lore.kernel.org/linux-cve-announce/2024022751-CVE-2021-46935-f8f4@gregkh/T/#u\nhttps://redos.red-soft.ru/support/secure/\nhttps://www.cve.org/CVERecord?id=CVE-2021-46935\nhttps://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81",
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  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-668",
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}

CVE-2021-46935 (GCVE-0-2021-46935)

Vulnerability from cvelistv5 – Published: 2024-02-27 09:44 – Updated: 2025-05-04 07:00

Title

binder: fix async_free_space accounting for empty parcels

Summary

In the Linux kernel, the following vulnerability has been resolved: binder: fix async_free_space accounting for empty parcels In 4.13, commit 74310e06be4d ("android: binder: Move buffer out of area shared with user space") fixed a kernel structure visibility issue. As part of that patch, sizeof(void *) was used as the buffer size for 0-length data payloads so the driver could detect abusive clients sending 0-length asynchronous transactions to a server by enforcing limits on async_free_size. Unfortunately, on the "free" side, the accounting of async_free_space did not add the sizeof(void *) back. The result was that up to 8-bytes of async_free_space were leaked on every async transaction of 8-bytes or less. These small transactions are uncommon, so this accounting issue has gone undetected for several years. The fix is to use "buffer_size" (the allocated buffer size) instead of "size" (the logical buffer size) when updating the async_free_space during the free operation. These are the same except for this corner case of asynchronous transactions with payloads < 8 bytes.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2d2df539d05205fd8…
	https://git.kernel.org/stable/c/7c7064402609aeb6f…
	https://git.kernel.org/stable/c/103b16a8c51f96d5f…
	https://git.kernel.org/stable/c/1cb8444f3114f0bb2…
	https://git.kernel.org/stable/c/17691bada6b2f1d5f…
	https://git.kernel.org/stable/c/cfd0d84ba28c18b53…

Impacted products

Vendor

Product

Version

Linux

Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < 2d2df539d05205fd83c404d5f2dff48d36f9b495 (git)
Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < 7c7064402609aeb6fb11be1b4ec10673ff17b593 (git)
Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < 103b16a8c51f96d5fe063022869ea906c256e5da (git)
Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < 1cb8444f3114f0bb2f6e3bcadcf09aa4a28425d4 (git)
Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < 17691bada6b2f1d5f1c0f6d28cd9d0727023b0ff (git)
Affected: 74310e06be4d74dcf67cd108366710dee5c576d5 , < cfd0d84ba28c18b531648c9d4a35ecca89ad9901 (git)

Linux

Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 4.14.261 , ≤ 4.14.* (semver)
Unaffected: 4.19.224 , ≤ 4.19.* (semver)
Unaffected: 5.4.170 , ≤ 5.4.* (semver)
Unaffected: 5.10.90 , ≤ 5.10.* (semver)
Unaffected: 5.15.13 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

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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:2024-06345

CVE-2021-46935 (GCVE-0-2021-46935)

Tags

Sightings

Nomenclature