Vulnerability-Lookup

BDU:2025-01076 (CVE-2022-48821)

Vulnerability from fstec – Published: 2025-02-03 – Updated: 2025-02-27 – View on bdu.fstec.ru Fixed

Title

Уязвимость компонента misc ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость компонента misc ядра операционной системы Linux связана с ошибками использования после освобождения. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

4.3 (Medium) CVSS 2.0


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

4.4 (Medium) CVSS 3.0


                      
                        CVSS:3.0/AV:L/AC:L/PR:H/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-416 - Использование после освобождения

Aliases

CVE-2022-48821

References

15 references

URL
https://git.kernel.org/linus/46963e2e0629cb31c96b1d47ddd89dc3d8990b34
https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34
https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215
https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc
https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5
https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.101
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.24
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.10
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.180
https://lore.kernel.org/linux-cve-announce/2024071650-CVE-2022-48821-5c97@gregkh/
https://redos.red-soft.ru/support/secure/
https://security-tracker.debian.org/tracker/CVE-2022-48821
https://www.cve.org/CVERecord?id=CVE-2022-48821
https://www.suse.com/security/cve/CVE-2022-48821.html

Impacted products

23 products from 3 vendors

Vendors

Novell Inc., Сообщество свободного программного обеспечения, ООО «Ред Софт»

Products

OpenSUSE Leap, Debian GNU/Linux, SUSE Linux Enterprise High Availability Extension, РЕД ОС (запись в едином реестре российских программ №3751), SUSE Linux Enterprise High Performance Computing, SUSE Linux Enterprise Micro, Suse Linux Enterprise Server, SUSE Manager Retail Branch Server, SUSE Manager Proxy, SUSE Manager Server, SUSE Enterprise Storage, SUSE Linux Enterprise Live Patching, Suse Linux Enterprise Desktop, SUSE Linux Enterprise Module for SAP Applications, SUSE Linux Enterprise Module for Basesystem, SUSE Linux Enterprise Module for Development Tools, SUSE Linux Enterprise Module for Public Cloud, SUSE Linux Enterprise Real Time, SUSE Linux Enterprise Module for Legacy Software, Linux, SUSE Linux Enterprise Workstation Extension, openSUSE Leap Micro, SUSE Real Time Module

Versions

15.5 (OpenSUSE Leap), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), 15 SP3 (SUSE Linux Enterprise High Availability Extension), 7.3 (РЕД ОС), 15 SP2-LTSS (SUSE Linux Enterprise High Performance Computing), 5.1 (SUSE Linux Enterprise Micro), 5.2 (SUSE Linux Enterprise Micro), 15 SP2-LTSS (Suse Linux Enterprise Server), 4.3 (SUSE Manager Retail Branch Server), 4.3 (SUSE Manager Proxy), 4.3 (SUSE Manager Server), 7.1 (SUSE Enterprise Storage), 5.3 (SUSE Linux Enterprise Micro), 15 SP2 (SUSE Linux Enterprise High Availability Extension), 15 SP2 (SUSE Linux Enterprise Live Patching), 15 SP3 (SUSE Linux Enterprise Live Patching), 15 SP4 (SUSE Linux Enterprise Live Patching), 15 SP3-LTSS (Suse Linux Enterprise Server), 15 SP3-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP4 (SUSE Linux Enterprise High Availability Extension), 15 SP5 (Suse Linux Enterprise Server), 15 SP5 (Suse Linux Enterprise Desktop), 15 SP2 (SUSE Linux Enterprise Module for SAP Applications), 15 SP3 (SUSE Linux Enterprise Module for SAP Applications), 15 SP4 (SUSE Linux Enterprise Module for SAP Applications), 15 SP5 (SUSE Linux Enterprise High Performance Computing), 15 SP5 (SUSE Linux Enterprise Module for Basesystem), 15 SP5 (SUSE Linux Enterprise Module for Development Tools), 15 SP5 (SUSE Linux Enterprise Module for Public Cloud), 15 SP5 (SUSE Linux Enterprise Real Time), 5.4 (SUSE Linux Enterprise Micro), 15 SP5 (SUSE Linux Enterprise Module for Legacy Software), 15 SP5 (SUSE Linux Enterprise Live Patching), от 5.5 до 5.10.100 включительно (Linux), от 5.11 до 5.15.23 включительно (Linux), 15 SP5 (SUSE Linux Enterprise Module for SAP Applications), 15 SP5 (SUSE Linux Enterprise Workstation Extension), 5.5 (SUSE Linux Enterprise Micro), 5.5 (openSUSE Leap Micro), 15 SP4-ESPOS (SUSE Linux Enterprise High Performance Computing), 15 SP4-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP4-LTSS (Suse Linux Enterprise Server), 15 SP5 (SUSE Real Time Module), 15 SP5 (SUSE Linux Enterprise High Availability Extension), от 5.16 до 5.16.9 включительно (Linux), от 5.1 до 5.4.179 включительно (Linux)

Product types

Operating system, Application software, Network device, Network software

Platforms

ООО «Ред Софт» РЕД ОС 7.3 (запись в едином реестре российских программ №3751), Сообщество свободного программного обеспечения Linux до 5.17, Сообщество свободного программного обеспечения Linux от 5.16 до 5.16.10, Сообщество свободного программного обеспечения Linux от 5.10 до 5.10.101, Сообщество свободного программного обеспечения Linux от 5.15 до 5.15.24, Сообщество свободного программного обеспечения Linux от 5.1 до 5.4.180

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/2024071650-CVE-2022-48821-5c97@gregkh/ https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34 https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215 https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5 https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d Для РедОС: http://repo.red-soft.ru/redos/7.3c/x86_64/updates/ Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2022-48821 Для программных продуктов Novell Inc.: https://www.suse.com/security/cve/CVE-2022-48821.html

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:M/C:N/I:N/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:H/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": "Novell Inc., \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, \u041e\u041e\u041e \u00ab\u0420\u0435\u0434 \u0421\u043e\u0444\u0442\u00bb",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "15.5 (OpenSUSE Leap), 11 (Debian GNU/Linux), 12 (Debian GNU/Linux), 15 SP3 (SUSE Linux Enterprise High Availability Extension), 7.3 (\u0420\u0415\u0414 \u041e\u0421), 15 SP2-LTSS (SUSE Linux Enterprise High Performance Computing), 5.1 (SUSE Linux Enterprise Micro), 5.2 (SUSE Linux Enterprise Micro), 15 SP2-LTSS (Suse Linux Enterprise Server), 4.3 (SUSE Manager Retail Branch Server), 4.3 (SUSE Manager Proxy), 4.3 (SUSE Manager Server), 7.1 (SUSE Enterprise Storage), 5.3 (SUSE Linux Enterprise Micro), 15 SP2 (SUSE Linux Enterprise High Availability Extension), 15 SP2 (SUSE Linux Enterprise Live Patching), 15 SP3 (SUSE Linux Enterprise Live Patching), 15 SP4 (SUSE Linux Enterprise Live Patching), 15 SP3-LTSS (Suse Linux Enterprise Server), 15 SP3-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP4 (SUSE Linux Enterprise High Availability Extension), 15 SP5 (Suse Linux Enterprise Server), 15 SP5 (Suse Linux Enterprise Desktop), 15 SP2 (SUSE Linux Enterprise Module for SAP Applications), 15 SP3 (SUSE Linux Enterprise Module for SAP Applications), 15 SP4 (SUSE Linux Enterprise Module for SAP Applications), 15 SP5 (SUSE Linux Enterprise High Performance Computing), 15 SP5 (SUSE Linux Enterprise Module for Basesystem), 15 SP5 (SUSE Linux Enterprise Module for Development Tools), 15 SP5 (SUSE Linux Enterprise Module for Public Cloud), 15 SP5 (SUSE Linux Enterprise Real Time), 5.4 (SUSE Linux Enterprise Micro), 15 SP5 (SUSE Linux Enterprise Module for Legacy Software), 15 SP5 (SUSE Linux Enterprise Live Patching), \u043e\u0442 5.5 \u0434\u043e 5.10.100 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.15.23 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), 15 SP5 (SUSE Linux Enterprise Module for SAP Applications), 15 SP5 (SUSE Linux Enterprise Workstation Extension), 5.5 (SUSE Linux Enterprise Micro), 5.5 (openSUSE Leap Micro), 15 SP4-ESPOS (SUSE Linux Enterprise High Performance Computing), 15 SP4-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP4-LTSS (Suse Linux Enterprise Server), 15 SP5 (SUSE Real Time Module), 15 SP5 (SUSE Linux Enterprise High Availability Extension), \u043e\u0442 5.16 \u0434\u043e 5.16.9 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.1 \u0434\u043e 5.4.179 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0412 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \"\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u043e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0439 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c LINUX\", \u0438\u0437\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u0432 \u043c\u0435\u0442\u043e\u0434\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u0424\u0421\u0422\u042d\u041a \u0420\u043e\u0441\u0441\u0438\u0438, \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d\u043d\u043e\u043c 25 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2022 \u0433\u043e\u0434\u0430. \n\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439: \n\u0414\u043b\u044f Linux:\nhttps://lore.kernel.org/linux-cve-announce/2024071650-CVE-2022-48821-5c97@gregkh/\nhttps://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34\t\nhttps://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215\t\nhttps://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc\t\nhttps://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5\t\nhttps://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d\n\n\u0414\u043b\u044f \u0420\u0435\u0434\u041e\u0421: \nhttp://repo.red-soft.ru/redos/7.3c/x86_64/updates/\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2022-48821\n\n\u0414\u043b\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432 Novell Inc.:\nhttps://www.suse.com/security/cve/CVE-2022-48821.html",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "03.02.2022",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "27.02.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "03.02.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-01076",
  "\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-2022-48821",
  "\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": "OpenSUSE Leap, Debian GNU/Linux, SUSE Linux Enterprise High Availability Extension, \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), SUSE Linux Enterprise High Performance Computing, SUSE Linux Enterprise Micro, Suse Linux Enterprise Server, SUSE Manager Retail Branch Server, SUSE Manager Proxy, SUSE Manager Server, SUSE Enterprise Storage, SUSE Linux Enterprise Live Patching, Suse Linux Enterprise Desktop, SUSE Linux Enterprise Module for SAP Applications, SUSE Linux Enterprise Module for Basesystem, SUSE Linux Enterprise Module for Development Tools, SUSE Linux Enterprise Module for Public Cloud, SUSE Linux Enterprise Real Time, SUSE Linux Enterprise Module for Legacy Software, Linux, SUSE Linux Enterprise Workstation Extension, openSUSE Leap Micro, SUSE Real Time Module",
  "\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\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 \u0434\u043e 5.17 , \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 5.16 \u0434\u043e 5.16.10 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.10 \u0434\u043e 5.10.101 , \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 \u0434\u043e 5.15.24 , \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 5.1 \u0434\u043e 5.4.180 ",
  "\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 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 misc \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": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0441\u043b\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (CWE-416)",
  "\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 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 misc \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 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://git.kernel.org/linus/46963e2e0629cb31c96b1d47ddd89dc3d8990b34\nhttps://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34\nhttps://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215\nhttps://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc\nhttps://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5\nhttps://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.101\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.24\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.10\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.180\nhttps://lore.kernel.org/linux-cve-announce/2024071650-CVE-2022-48821-5c97@gregkh/\nhttps://redos.red-soft.ru/support/secure/\nhttps://security-tracker.debian.org/tracker/CVE-2022-48821\nhttps://www.cve.org/CVERecord?id=CVE-2022-48821\nhttps://www.suse.com/security/cve/CVE-2022-48821.html",
  "\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, \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, \u0421\u0435\u0442\u0435\u0432\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e, \u0421\u0435\u0442\u0435\u0432\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-416",
  "\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 4,3)\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 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 4,4)\n\u041d\u0435\u0442 \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u043e\u0446\u0435\u043d\u043a\u0430 CVSS 4.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 0)"
}

CVE-2022-48821 (GCVE-0-2022-48821)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:44 – Updated: 2026-08-05 08:52

Title

misc: fastrpc: avoid double fput() on failed usercopy

Summary

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput() on failed usercopy If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dma_buf_fd() called fd_install() before, i.e. "consumed" one reference, leaving us with none. Calling dma_buf_put() will therefore put a reference we no longer own, leading to a valid file descritor table entry for an already released 'file' object which is a straight use-after-free. Simply avoid calling dma_buf_put() and rely on the process exit code to do the necessary cleanup, if needed, i.e. if the file descriptor is still valid.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:57 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6639 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119…
https://git.kernel.org/stable/c/a5ce7ee5fcc075831…
https://git.kernel.org/stable/c/e4382d0a39f9a1e26…
https://git.kernel.org/stable/c/76f85c307ef9f10aa…
https://git.kernel.org/stable/c/46963e2e0629cb31c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6cffd79504ce040f460831030d3069fa1c99bb71 , < 4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215 (git) Affected: 6cffd79504ce040f460831030d3069fa1c99bb71 , < a5ce7ee5fcc07583159f54ab4af5164de00148f5 (git) Affected: 6cffd79504ce040f460831030d3069fa1c99bb71 , < e4382d0a39f9a1e260d62fdc079ddae5293c037d (git) Affected: 6cffd79504ce040f460831030d3069fa1c99bb71 , < 76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc (git) Affected: 6cffd79504ce040f460831030d3069fa1c99bb71 , < 46963e2e0629cb31c96b1d47ddd89dc3d8990b34 (git)
Linux	Linux	Affected: 5.1 Unaffected: 0 , < 5.1 (semver) Unaffected: 5.4.180 , ≤ 5.4.* (semver) Unaffected: 5.10.101 , ≤ 5.10.* (semver) Unaffected: 5.15.24 , ≤ 5.15.* (semver) Unaffected: 5.16.10 , ≤ 5.16.* (semver) Unaffected: 5.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

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To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T15:25:01.487Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48821",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:57:59.542299Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:12.159Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "a5ce7ee5fcc07583159f54ab4af5164de00148f5",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "e4382d0a39f9a1e260d62fdc079ddae5293c037d",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "46963e2e0629cb31c96b1d47ddd89dc3d8990b34",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.1"
            },
            {
              "lessThan": "5.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.180",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.180",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.101",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.24",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16.10",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: avoid double fput() on failed usercopy\n\nIf the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF\nioctl(), we shouldn\u0027t assume that \u0027buf-\u003edmabuf\u0027 is still valid. In fact,\ndma_buf_fd() called fd_install() before, i.e. \"consumed\" one reference,\nleaving us with none.\n\nCalling dma_buf_put() will therefore put a reference we no longer own,\nleading to a valid file descritor table entry for an already released\n\u0027file\u0027 object which is a straight use-after-free.\n\nSimply avoid calling dma_buf_put() and rely on the process exit code to\ndo the necessary cleanup, if needed, i.e. if the file descriptor is\nstill valid."
        }
      ],
      "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 - The bug is triggered via ioctl(FASTRPC_IOCTL_ALLOC_DMA_BUFF) on the local misc device /dev/fastrpc-*, not via network or adjacent packets.\nAC:L - An attacker can reliably force the copy_to_user failure after dma_buf_fd()/fd_install() by passing a read-only userspace buffer (or racing munmap/mprotect); no conditions outside attacker control are required.\nPR:L - Opening /dev/fastrpc-* and calling ALLOC_DMA_BUFF requires no capabilities in the driver; FastRPC is designed for unprivileged userspace clients (e.g. Android apps on Qualcomm devices).\nUI:N - The attacker triggers the ioctl themselves; no victim action is needed.\nS:U - Impact is a kernel file-object UAF enabling local privilege escalation within the same OS security authority, not a VM/IOMMU boundary escape.\nC:H - The dangling FD references a freed struct file, a classic UAF primitive that can be leveraged for arbitrary kernel memory disclosure.\nI:H - File UAF enables heap reuse and f_op/control-flow hijacking for arbitrary kernel writes and code execution.\nA:H - Use of the dangling FD after the erroneous dma_buf_put() can crash the kernel (oops/panic) even without full exploitation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:52:29.928Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d"
        },
        {
          "url": "https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34"
        }
      ],
      "title": "misc: fastrpc: avoid double fput() on failed usercopy",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48821",
    "datePublished": "2024-07-16T11:44:07.965Z",
    "dateReserved": "2024-07-16T11:38:08.901Z",
    "dateUpdated": "2026-08-05T08:52:29.928Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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