Vulnerability-Lookup

BDU:2026-13774 (CVE-2026-64531)

Vulnerability from fstec – Published: 2026-09-03 – Updated: 2026-09-08 – View on bdu.fstec.ru Fixed

Title

Уязвимость модуля net/openvswitch/flow_netlink.c ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии

Summary

Уязвимость модуля net/openvswitch/flow_netlink.c ядра операционной системы Linux связана с ошибками при обработке параметров длины. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии

Severity

6.8 (Medium) CVSS 2.0


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

7.8 (High) CVSS 3.1


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-130 - Неправильная обработка несоответствия параметра длины

Aliases

CVE-2026-64531

References

11 references

URL
https://lore.kernel.org/linux-cve-announce/2026072732-CVE-2026-64531-e4ce@gregkh/
https://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe
https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b
https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572
https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349
https://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f
https://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749
https://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385
https://security-tracker.debian.org/tracker/CVE-2026-64531
https://access.redhat.com/security/cve/cve-2026-64531
https://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0903SE18HF

Impacted products

5 products from 4 vendors

Vendors

Red Hat, Inc., Сообщество свободного программного обеспечения, ООО «РусБИТех-Астра»

Products

OpenShift Container Platform, Debian GNU/Linux, Red Hat Enterprise Linux, Astra Linux Special Edition (запись в едином реестре российских программ №369), Linux

Versions

4 (OpenShift Container Platform), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), 9 (Red Hat Enterprise Linux), 4.14 (OpenShift Container Platform), 4.16 (OpenShift Container Platform), 1.8 (Astra Linux Special Edition), 10 (Red Hat Enterprise Linux), 9.2 Update Services for SAP Solutions (Red Hat Enterprise Linux), 13 (Debian GNU/Linux), 9.4 Update Services for SAP Solutions (Red Hat Enterprise Linux), 4.22 (OpenShift Container Platform), от 7.2 до 7.2-rc4 (Linux), 4.18 (OpenShift Container Platform), от 5.15.180 до 5.15.212 (Linux), от 6.1.132 до 6.1.178 (Linux), от 6.6.84 до 6.6.145 (Linux), от 6.12.20 до 6.12.97 (Linux), от 6.14 до 6.18.40 (Linux), от 7.1 до 7.1.5 (Linux), 6.13.8 (Linux)

Product types

Application software, Operating system

Platforms

Сообщество свободного программного обеспечения Debian GNU/Linux 11, Сообщество свободного программного обеспечения Debian GNU/Linux 12, Red Hat, Inc. Red Hat Enterprise Linux 9, ООО «РусБИТех-Астра» Astra Linux Special Edition 1.8 (запись в едином реестре российских программ №369), Inc. Red Hat Enterprise Linux 10, Inc. Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Сообщество свободного программного обеспечения Debian GNU/Linux 13, Inc. Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Сообщество свободного программного обеспечения Linux от 7.2 до 7.2-rc4, Сообщество свободного программного обеспечения Linux от 5.15.180 до 5.15.212, Сообщество свободного программного обеспечения Linux от 6.1.132 до 6.1.178, Сообщество свободного программного обеспечения Linux от 6.6.84 до 6.6.145, Сообщество свободного программного обеспечения Linux от 6.12.20 до 6.12.97, Сообщество свободного программного обеспечения Linux от 6.14 до 6.18.40, Сообщество свободного программного обеспечения Linux от 7.1 до 7.1.5, Сообщество свободного программного обеспечения Linux 6.13.8

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/2026072732-CVE-2026-64531-e4ce@gregkh/ https://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572 https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349 https://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f https://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749 https://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385 Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2026-64531 Для продуктов Red Hat Inc.: https://access.redhat.com/security/cve/cve-2026-64531 Для ОС Astra Linux: - обновить пакет linux-6.1 до 6.1.166-1.astra2r12 или более высокой версии, используя рекомендации производителя: https://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0903SE18HF - обновить пакет linux-6.12 до 6.12.77-1.astra2r12 или более высокой версии, используя рекомендации производителя: https://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0903SE18HF

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:L/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,
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  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "4 (OpenShift Container Platform), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), 9 (Red Hat Enterprise Linux), 4.14 (OpenShift Container Platform), 4.16 (OpenShift Container Platform), 1.8 (Astra Linux Special Edition), 10 (Red Hat Enterprise Linux), 9.2 Update Services for SAP Solutions (Red Hat Enterprise Linux), 13 (Debian GNU/Linux), 9.4 Update Services for SAP Solutions (Red Hat Enterprise Linux), 4.22 (OpenShift Container Platform), \u043e\u0442 7.2 \u0434\u043e 7.2-rc4 (Linux), 4.18 (OpenShift Container Platform), \u043e\u0442 5.15.180 \u0434\u043e 5.15.212 (Linux), \u043e\u0442 6.1.132 \u0434\u043e 6.1.178 (Linux), \u043e\u0442 6.6.84 \u0434\u043e 6.6.145 (Linux), \u043e\u0442 6.12.20 \u0434\u043e 6.12.97 (Linux), \u043e\u0442 6.14 \u0434\u043e 6.18.40 (Linux), \u043e\u0442 7.1 \u0434\u043e 7.1.5 (Linux), 6.13.8 (Linux)",
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  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "06.07.2026",
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  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "03.09.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-13774",
  "\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-2026-64531",
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  "\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": "OpenShift Container Platform, Debian GNU/Linux, Red Hat Enterprise Linux, 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": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 11 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 12 , Red Hat, Inc. Red Hat Enterprise Linux 9 , \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), Red Hat, Inc. Red Hat Enterprise Linux 10 , Red Hat, Inc. Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions , \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 13 , Red Hat, Inc. Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions , \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 7.2 \u0434\u043e 7.2-rc4 , \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 5.15.180 \u0434\u043e 5.15.212 , \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 6.1.132 \u0434\u043e 6.1.178 , \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 6.6.84 \u0434\u043e 6.6.145 , \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 6.12.20 \u0434\u043e 6.12.97 , \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 6.18.40 , \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 7.1 \u0434\u043e 7.1.5 , \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 6.13.8 ",
  "\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 net/openvswitch/flow_netlink.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\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\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043d\u0435\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u044f \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 \u0434\u043b\u0438\u043d\u044b (CWE-130)",
  "\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 net/openvswitch/flow_netlink.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 \u0434\u043b\u0438\u043d\u044b. \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 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\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://lore.kernel.org/linux-cve-announce/2026072732-CVE-2026-64531-e4ce@gregkh/\nhttps://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe\nhttps://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b\nhttps://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572\nhttps://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349\nhttps://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f\nhttps://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749\nhttps://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385\nhttps://security-tracker.debian.org/tracker/CVE-2026-64531\nhttps://access.redhat.com/security/cve/cve-2026-64531\nhttps://wiki.astralinux.ru/astra-linux-se18-bulletin-2026-0903SE18HF",
  "\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": "\u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c, \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-130",
  "\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 6,8)\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 7,8)"
}

CVE-2026-64531 (GCVE-0-2026-64531)

Vulnerability from cvelistv5 – Published: 2026-07-27 06:32 – Updated: 2026-08-22 04:12

Title

net: openvswitch: reject oversized nested action attrs

Summary

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbehaving actions length check") allowed the total sw_flow_actions stream to grow beyond 64 KiB, which is valid, but also removed the last guard preventing a generated nested action attribute from exceeding U16_MAX. An oversized generated container can thus be closed with a truncated nla_len. A later dump or teardown then walks a structurally different stream than the one that was validated. In particular, an oversized nested CLONE/CT action may cause subsequent bytes in the generated stream to be interpreted as independent actions. Keep the larger total-action-stream behavior, but make nested action close reject generated containers that do not fit in nla_len, and return the error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and CHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse construction order before discarding failed wrappers, so resources copied into the rejected tails are released before the wrappers are removed. Most failed outer wrappers are discarded by truncating actions_len after child resources have been released. CHECK_PKT_LEN also trims its parent after branch resources are gone. SET/TUNNEL close failures unwind their known tun_dst ownership directly, and SET_TO_MASKED has no external ownership and truncates on close failure.

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

12 references

URL	Tags
https://git.kernel.org/stable/c/ab855641241387db0…
https://git.kernel.org/stable/c/c66bd2626c2764f23…
https://git.kernel.org/stable/c/d573250d228401f70…
https://git.kernel.org/stable/c/f1efff88584031913…
https://git.kernel.org/stable/c/dbd14f736be02cfe7…
https://git.kernel.org/stable/c/1b41cbe05b184f886…
https://git.kernel.org/stable/c/3f1f755366687d051…
http://www.openwall.com/lists/oss-security/2026/07/28/8
http://www.openwall.com/lists/oss-security/2026/0…
http://www.openwall.com/lists/oss-security/2026/08/01/1
http://www.openwall.com/lists/oss-security/2026/08/01/3
http://www.openwall.com/lists/oss-security/2026/08/22/1

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 057dbc5b72e9fcac439cd561c3a539b8a0edeb92 , < ab855641241387db062a5e41d9ad6b8561542572 (git) Affected: 2532adbfe917c0e71dba2650ffc6efe396314c87 , < c66bd2626c2764f23764ff0f8277f44a9cfe8349 (git) Affected: 4b1a0ee6164c7204c68ab5a9c48c07bfe8852485 , < d573250d228401f707f4dbc09d11227a6215ee5f (git) Affected: e6610f9c08b4c04cf7949c10fc246c071d00e935 , < f1efff8858403191361a01269c6fe8dd7f55a385 (git) Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < dbd14f736be02cfe73049bd801af89becd1a0749 (git) Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < 1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe (git) Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < 3f1f755366687d051174739fb99f7d560202f60b (git) Affected: 6b099d285d7ed324494b6d684f377aa103856118 (git) Affected: 5.15.180 , < 5.15.212 (semver) Affected: 6.1.132 , < 6.1.178 (semver) Affected: 6.6.84 , < 6.6.145 (semver) Affected: 6.12.20 , < 6.12.97 (semver) Affected: 6.13.8 , < 6.14 (semver)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2026-08-22T04:12:18.141Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/28/8"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/31/17"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/01/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/01/3"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/22/1"
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        ],
        "title": "CVE Program Container"
      }
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    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
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        {
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          "product": "Linux",
          "programFiles": [
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              "status": "unaffected",
              "version": "6.12.97",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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                  "vulnerable": true
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                {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: reject oversized nested action attrs\n\nOpen vSwitch stores generated flow actions as nlattrs, whose nla_len\nfield is u16. Commit a1e64addf3ff (\"net: openvswitch: remove\nmisbehaving actions length check\") allowed the total sw_flow_actions\nstream to grow beyond 64 KiB, which is valid, but also removed the last\nguard preventing a generated nested action attribute from exceeding\nU16_MAX.\n\nAn oversized generated container can thus be closed with a truncated\nnla_len. A later dump or teardown then walks a structurally different\nstream than the one that was validated. In particular, an oversized\nnested CLONE/CT action may cause subsequent bytes in the generated\nstream to be interpreted as independent actions.\n\nKeep the larger total-action-stream behavior, but make nested action\nclose reject generated containers that do not fit in nla_len, and return\nthe error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and\nCHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse\nconstruction order before discarding failed wrappers, so resources copied\ninto the rejected tails are released before the wrappers are removed.\n\nMost failed outer wrappers are discarded by truncating actions_len after\nchild resources have been released. CHECK_PKT_LEN also trims its parent\nafter branch resources are gone. SET/TUNNEL close failures unwind their\nknown tun_dst ownership directly, and SET_TO_MASKED has no external\nownership and truncates on close failure."
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      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable action builder is reached through local Generic Netlink requests such as OVS_FLOW_CMD_NEW or OVS_PACKET_CMD_EXECUTE. Remote packets cannot construct the malformed action stream.\nAC:L - The attacker deterministically controls the nested-action expansion, wrapped length, and resulting parser alignment; no race or uncontrollable condition is required.\nPR:L - The operations require CAP_NET_ADMIN but use GENL_UNS_ADMIN_PERM in namespace-aware families. An unprivileged user can obtain the required capability through an allowed user and network namespace.\nUI:N - Once the attacker sends the crafted netlink request, vulnerable dumping, teardown, or execution occurs without another user\u0027s participation.\nS:U - The vulnerability and its effects remain within the host kernel\u0027s security authority. Kernel privilege escalation from a user namespace does not constitute a CVSS scope change.\nC:H - Length truncation can reinterpret attacker-controlled userdata as an internal SET or CT action. The dump path can consequently dereference an attacker-selected kernel pointer and serialize referenced memory.\nI:H - Fake SET or CT actions can make execution or teardown perform reference-count operations, releases, and frees through attacker-controlled pointers. This provides exploitable memory-corruption primitives capable of kernel code execution.\nA:H - Attacker-controlled invalid pointers can cause a kernel oops or panic, while zero-length misparsed actions can cause a non-advancing execution loop and soft lockup."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:57:08.992Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572"
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        {
          "url": "https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349"
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        },
        {
          "url": "https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b"
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      ],
      "title": "net: openvswitch: reject oversized nested action attrs",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64531",
    "datePublished": "2026-07-27T06:32:32.596Z",
    "dateReserved": "2026-07-19T15:36:31.794Z",
    "dateUpdated": "2026-08-22T04:12:18.141Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.