Vulnerability-Lookup

BDU:2025-06271 (CVE-2023-52973)

Vulnerability from fstec – Published: 2025-06-02 – Updated: 2026-02-17 – View on bdu.fstec.ru Fixed

Title

Уязвимость функции vcs_read() ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функции vcs_read() ядра операционной системы Linux связана с использованием памяти после освобождения. 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

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-416 - Использование после освобождения

Aliases

CVE-2023-52973, ROS-20250528-01

References

13 references

URL
https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066
https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78
https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f
https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab
https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18
https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df
https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34
https://redos.red-soft.ru/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti…
https://access.redhat.com/security/cve/CVE-2023-52973
https://www.suse.com/security/cve/CVE-2023-52973.html
https://security-tracker.debian.org/tracker/CVE-2023-52973
https://ubuntu.com/security/CVE-2023-52973
https://cve.omp.ru/bb30515

Impacted products

18 products from 8 vendors

Vendors

Canonical Ltd., Red Hat, Inc., Novell Inc., Сообщество свободного программного обеспечения, ООО «Ред Софт», ООО "Открытая мобильная платформа", АО «СберТех»

Products

Ubuntu, Red Hat Enterprise Linux, SUSE Linux Enterprise Live Patching, Debian GNU/Linux, SUSE Linux Enterprise High Availability Extension, РЕД ОС (запись в едином реестре российских программ №3751), SUSE Linux Enterprise Server for SAP Applications, SUSE Linux Enterprise Micro, SUSE Manager Retail Branch Server, SUSE Manager Proxy, SUSE Manager Server, SUSE Enterprise Storage, Suse Linux Enterprise Server, SUSE Linux Enterprise High Performance Computing, Linux, SUSE Linux Enterprise Server LTSS Extended Security, ОС Аврора (запись в едином реестре российских программ №1543), Platform V SberLinux OS Server (запись в едином реестре российских программ №18785)

Versions

14.04 LTS (Ubuntu), 16.04 LTS (Ubuntu), 18.04 LTS (Ubuntu), 8 (Red Hat Enterprise Linux), 12 SP5 (SUSE Linux Enterprise Live Patching), 20.04 LTS (Ubuntu), 11 (Debian GNU/Linux), 15 SP3 (SUSE Linux Enterprise High Availability Extension), 7.3 (РЕД ОС), 15 SP3 (SUSE Linux Enterprise Server for SAP Applications), 5.1 (SUSE Linux Enterprise Micro), 15 SP4 (SUSE Linux Enterprise Server for SAP Applications), 5.2 (SUSE Linux Enterprise Micro), 22.04 LTS (Ubuntu), 9 (Red Hat Enterprise Linux), 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 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), до 6.2 (Linux), 15 SP5 (SUSE Linux Enterprise Server for SAP Applications), 5.4 (SUSE Linux Enterprise Micro), 15 SP5 (SUSE Linux Enterprise Live Patching), 5.5 (SUSE Linux Enterprise Micro), 8.8 Extended Update Support (Red Hat Enterprise Linux), 9.2 Extended Update Support (Red Hat Enterprise Linux), 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), 12 SP5-LTSS (Suse Linux Enterprise Server), 15 SP5-LTSS (Suse Linux Enterprise Server), 15 SP5-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP5-ESPOS (SUSE Linux Enterprise High Performance Computing), 12 SP5 (SUSE Linux Enterprise Server LTSS Extended Security), от 4.19.0 до 4.19.273 (Linux), от 5.10.0 до 5.10.168 (Linux), от 5.15.0 до 5.15.93 (Linux), от 5.4.0 до 5.4.232 (Linux), от 6.1.0 до 6.1.11 (Linux), от 4.14.0 до 4.14.329 (Linux), до 5.1.5 включительно (ОС Аврора), 9.2.0-fstec (Platform V SberLinux OS Server)

Product types

Operating system, Application software, Network device, Network software

Platforms

Canonical Ltd. Ubuntu 14.04 LTS, Canonical Ltd. Ubuntu 16.04 LTS, Canonical Ltd. Ubuntu 18.04 LTS, Red Hat, Inc. Red Hat Enterprise Linux 8, Canonical Ltd. Ubuntu 20.04 LTS, Сообщество свободного программного обеспечения Debian GNU/Linux 11, ООО «Ред Софт» РЕД ОС 7.3 (запись в едином реестре российских программ №3751), Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP3, Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP4, Canonical Ltd. Ubuntu 22.04 LTS, Inc. Red Hat Enterprise Linux 9, Novell Inc. Suse Linux Enterprise Server 15 SP3-LTSS, Сообщество свободного программного обеспечения Linux до 6.2, Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP5, Inc. Red Hat Enterprise Linux 8.8 Extended Update Support, Inc. Red Hat Enterprise Linux 9.2 Extended Update Support, Novell Inc. Suse Linux Enterprise Server 15 SP4-LTSS, Novell Inc. Suse Linux Enterprise Server 12 SP5-LTSS, Novell Inc. Suse Linux Enterprise Server 15 SP5-LTSS, Сообщество свободного программного обеспечения Linux от 4.19.0 до 4.19.273, Сообщество свободного программного обеспечения Linux от 5.10.0 до 5.10.168, Сообщество свободного программного обеспечения Linux от 5.15.0 до 5.15.93, Сообщество свободного программного обеспечения Linux от 5.4.0 до 5.4.232, Сообщество свободного программного обеспечения Linux от 6.1.0 до 6.1.11, Сообщество свободного программного обеспечения Linux от 4.14.0 до 4.14.329, ООО "Открытая мобильная платформа" ОС Аврора до 5.1.5 включительно (запись в едином реестре российских программ №1543), АО «СберТех» Platform V SberLinux OS Server 9.2.0-fstec (запись в едином реестре российских программ №18785)

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://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78 https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34 Для РедОС: http://repo.red-soft.ru/redos/7.3c/x86_64/updates/ Для программных продуктов Red Hat Inc.: https://access.redhat.com/security/cve/CVE-2023-52973 Для программных продуктов Novell Inc.: https://www.suse.com/security/cve/CVE-2023-52973.html Для Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2023-52973 Для программных продуктов Ubuntu: https://ubuntu.com/security/CVE-2023-52973 Для ОС Аврора: https://cve.omp.ru/bb30515

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:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Canonical Ltd., Red Hat, Inc., 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, \u041e\u041e\u041e \"\u041e\u0442\u043a\u0440\u044b\u0442\u0430\u044f \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\", \u0410\u041e \u00ab\u0421\u0431\u0435\u0440\u0422\u0435\u0445\u00bb",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "14.04 LTS (Ubuntu), 16.04 LTS (Ubuntu), 18.04 LTS (Ubuntu), 8 (Red Hat Enterprise Linux), 12 SP5 (SUSE Linux Enterprise Live Patching), 20.04 LTS (Ubuntu), 11 (Debian GNU/Linux), 15 SP3 (SUSE Linux Enterprise High Availability Extension), 7.3 (\u0420\u0415\u0414 \u041e\u0421), 15 SP3 (SUSE Linux Enterprise Server for SAP Applications), 5.1 (SUSE Linux Enterprise Micro), 15 SP4 (SUSE Linux Enterprise Server for SAP Applications), 5.2 (SUSE Linux Enterprise Micro), 22.04 LTS (Ubuntu), 9 (Red Hat Enterprise Linux), 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 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), \u0434\u043e 6.2 (Linux), 15 SP5 (SUSE Linux Enterprise Server for SAP Applications), 5.4 (SUSE Linux Enterprise Micro), 15 SP5 (SUSE Linux Enterprise Live Patching), 5.5 (SUSE Linux Enterprise Micro), 8.8 Extended Update Support (Red Hat Enterprise Linux), 9.2 Extended Update Support (Red Hat Enterprise Linux), 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), 12 SP5-LTSS (Suse Linux Enterprise Server), 15 SP5-LTSS (Suse Linux Enterprise Server), 15 SP5-LTSS (SUSE Linux Enterprise High Performance Computing), 15 SP5-ESPOS (SUSE Linux Enterprise High Performance Computing), 12 SP5 (SUSE Linux Enterprise Server LTSS Extended Security), \u043e\u0442 4.19.0 \u0434\u043e 4.19.273 (Linux), \u043e\u0442 5.10.0 \u0434\u043e 5.10.168 (Linux), \u043e\u0442 5.15.0 \u0434\u043e 5.15.93 (Linux), \u043e\u0442 5.4.0 \u0434\u043e 5.4.232 (Linux), \u043e\u0442 6.1.0 \u0434\u043e 6.1.11 (Linux), \u043e\u0442 4.14.0 \u0434\u043e 4.14.329 (Linux), \u0434\u043e 5.1.5 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (\u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430), 9.2.0-fstec (Platform V SberLinux OS Server)",
  "\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://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066\nhttps://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78\nhttps://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f\nhttps://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab\nhttps://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18\nhttps://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df\nhttps://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34\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 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432 Red Hat Inc.:\nhttps://access.redhat.com/security/cve/CVE-2023-52973\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-2023-52973.html\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2023-52973\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 Ubuntu:\nhttps://ubuntu.com/security/CVE-2023-52973\n\n\u0414\u043b\u044f \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430: https://cve.omp.ru/bb30515\n\n",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "24.01.2023",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "17.02.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "02.06.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-06271",
  "\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-2023-52973, ROS-20250528-01",
  "\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": "Ubuntu, Red Hat Enterprise Linux, SUSE Linux Enterprise Live Patching, 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 Server for SAP Applications, SUSE Linux Enterprise Micro, SUSE Manager Retail Branch Server, SUSE Manager Proxy, SUSE Manager Server, SUSE Enterprise Storage, Suse Linux Enterprise Server, SUSE Linux Enterprise High Performance Computing, Linux, SUSE Linux Enterprise Server LTSS Extended Security, \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 (\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 \u21161543), Platform V SberLinux OS Server (\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 \u211618785)",
  "\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": "Canonical Ltd. Ubuntu 14.04 LTS , Canonical Ltd. Ubuntu 16.04 LTS , Canonical Ltd. Ubuntu 18.04 LTS , Red Hat, Inc. Red Hat Enterprise Linux 8 , Canonical Ltd. Ubuntu 20.04 LTS , \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 , \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), Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP3 , Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP4 , Canonical Ltd. Ubuntu 22.04 LTS , Red Hat, Inc. Red Hat Enterprise Linux 9 , Novell Inc. Suse Linux Enterprise Server 15 SP3-LTSS , \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 6.2 , Novell Inc. SUSE Linux Enterprise Server for SAP Applications 15 SP5 , Red Hat, Inc. Red Hat Enterprise Linux 8.8 Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 9.2 Extended Update Support , Novell Inc. Suse Linux Enterprise Server 15 SP4-LTSS , Novell Inc. Suse Linux Enterprise Server 12 SP5-LTSS , Novell Inc. Suse Linux Enterprise Server 15 SP5-LTSS , \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 4.19.0 \u0434\u043e 4.19.273 , \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 5.10.0 \u0434\u043e 5.10.168 , \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 5.15.0 \u0434\u043e 5.15.93 , \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 5.4.0 \u0434\u043e 5.4.232 , \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 6.1.0 \u0434\u043e 6.1.11 , \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 Linux \u043e\u0442 4.14.0 \u0434\u043e 4.14.329 , \u041e\u041e\u041e \"\u041e\u0442\u043a\u0440\u044b\u0442\u0430\u044f \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\" \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 \u0434\u043e 5.1.5 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e  (\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 \u21161543), \u0410\u041e \u00ab\u0421\u0431\u0435\u0440\u0422\u0435\u0445\u00bb Platform V SberLinux OS Server 9.2.0-fstec  (\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 \u211618785)",
  "\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 vcs_read() \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 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 vcs_read() \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 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043f\u0430\u043c\u044f\u0442\u0438 \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/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066\nhttps://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78\nhttps://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f\nhttps://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab\nhttps://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18\nhttps://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df\nhttps://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34\nhttps://redos.red-soft.ru/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-kernel-lt-280525/?sphrase_id=1000202\nhttps://access.redhat.com/security/cve/CVE-2023-52973\nhttps://www.suse.com/security/cve/CVE-2023-52973.html\nhttps://security-tracker.debian.org/tracker/CVE-2023-52973\nhttps://ubuntu.com/security/CVE-2023-52973\nhttps://cve.omp.ru/bb30515\n",
  "\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 4,6)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)"
}

CVE-2023-52973 (GCVE-0-2023-52973)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-08-05 09:12

Title

vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF

Summary

In the Linux kernel, the following vulnerability has been resolved: vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF After a call to console_unlock() in vcs_read() the vc_data struct can be freed by vc_deallocate(). Because of that, the struct vc_data pointer load must be done at the top of while loop in vcs_read() to avoid a UAF when vcs_size() is called. Syzkaller reported a UAF in vcs_size(). BUG: KASAN: use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215) Read of size 4 at addr ffff8881137479a8 by task 4a005ed81e27e65/1537 CPU: 0 PID: 1537 Comm: 4a005ed81e27e65 Not tainted 6.2.0-rc5 #1 Hardware name: Red Hat KVM, BIOS 1.15.0-2.module Call Trace: <TASK> __asan_report_load4_noabort (mm/kasan/report_generic.c:350) vcs_size (drivers/tty/vt/vc_screen.c:215) vcs_read (drivers/tty/vt/vc_screen.c:415) vfs_read (fs/read_write.c:468 fs/read_write.c:450) ... </TASK> Allocated by task 1191: ... kmalloc_trace (mm/slab_common.c:1069) vc_allocate (./include/linux/slab.h:580 ./include/linux/slab.h:720 drivers/tty/vt/vt.c:1128 drivers/tty/vt/vt.c:1108) con_install (drivers/tty/vt/vt.c:3383) tty_init_dev (drivers/tty/tty_io.c:1301 drivers/tty/tty_io.c:1413 drivers/tty/tty_io.c:1390) tty_open (drivers/tty/tty_io.c:2080 drivers/tty/tty_io.c:2126) chrdev_open (fs/char_dev.c:415) do_dentry_open (fs/open.c:883) vfs_open (fs/open.c:1014) ... Freed by task 1548: ... kfree (mm/slab_common.c:1021) vc_port_destruct (drivers/tty/vt/vt.c:1094) tty_port_destructor (drivers/tty/tty_port.c:296) tty_port_put (drivers/tty/tty_port.c:312) vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2)) vt_ioctl (drivers/tty/vt/vt_ioctl.c:903) tty_ioctl (drivers/tty/tty_io.c:2776) ... The buggy address belongs to the object at ffff888113747800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 424 bytes inside of 1024-byte region [ffff888113747800, ffff888113747c00) The buggy address belongs to the physical page: page:00000000b3fe6c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113740 head:00000000b3fe6c7c order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 anon flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff) raw: 0017ffffc0010200 ffff888100042dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888113747880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff888113747980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888113747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Disabling lock debugging due to kernel taint

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: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-27 16:59 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/af79ea9a2443016f6…
https://git.kernel.org/stable/c/6332f52f44b977656…
https://git.kernel.org/stable/c/d0332cbf53dad06a2…
https://git.kernel.org/stable/c/55515d7d8743b71b8…
https://git.kernel.org/stable/c/fc9e27f3ba083534b…
https://git.kernel.org/stable/c/8506f16aae9daf354…
https://git.kernel.org/stable/c/226fae124b2dac217…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < af79ea9a2443016f64d8fd8d72020cc874f0e066 (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 6332f52f44b9776568bf3c0b714ddfb0bb175e78 (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < d0332cbf53dad06a22189cc341391237f4ea6d9f (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 55515d7d8743b71b80bfe68e89eb9d92630626ab (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 8506f16aae9daf354e3732bcfd447e2a97f023df (git) Affected: ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff , < 226fae124b2dac217ea5436060d623ff3385bc34 (git)
Linux	Linux	Affected: 2.6.38 Unaffected: 0 , < 2.6.38 (semver) Unaffected: 4.14.329 , ≤ 4.14.* (semver) Unaffected: 4.19.273 , ≤ 4.19.* (semver) Unaffected: 5.4.232 , ≤ 5.4.* (semver) Unaffected: 5.10.168 , ≤ 5.10.* (semver) Unaffected: 5.15.93 , ≤ 5.15.* (semver) Unaffected: 6.1.11 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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{
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          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
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              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
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                "timestamp": "2025-03-27T16:59:54.662104Z",
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          "shortName": "CISA-ADP"
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              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF\n\nAfter a call to console_unlock() in vcs_read() the vc_data struct can be\nfreed by vc_deallocate(). Because of that, the struct vc_data pointer\nload must be done at the top of while loop in vcs_read() to avoid a UAF\nwhen vcs_size() is called.\n\nSyzkaller reported a UAF in vcs_size().\n\nBUG: KASAN: use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)\nRead of size 4 at addr ffff8881137479a8 by task 4a005ed81e27e65/1537\n\nCPU: 0 PID: 1537 Comm: 4a005ed81e27e65 Not tainted 6.2.0-rc5 #1\nHardware name: Red Hat KVM, BIOS 1.15.0-2.module\nCall Trace:\n  \u003cTASK\u003e\n__asan_report_load4_noabort (mm/kasan/report_generic.c:350)\nvcs_size (drivers/tty/vt/vc_screen.c:215)\nvcs_read (drivers/tty/vt/vc_screen.c:415)\nvfs_read (fs/read_write.c:468 fs/read_write.c:450)\n...\n  \u003c/TASK\u003e\n\nAllocated by task 1191:\n...\nkmalloc_trace (mm/slab_common.c:1069)\nvc_allocate (./include/linux/slab.h:580 ./include/linux/slab.h:720\n     drivers/tty/vt/vt.c:1128 drivers/tty/vt/vt.c:1108)\ncon_install (drivers/tty/vt/vt.c:3383)\ntty_init_dev (drivers/tty/tty_io.c:1301 drivers/tty/tty_io.c:1413\n     drivers/tty/tty_io.c:1390)\ntty_open (drivers/tty/tty_io.c:2080 drivers/tty/tty_io.c:2126)\nchrdev_open (fs/char_dev.c:415)\ndo_dentry_open (fs/open.c:883)\nvfs_open (fs/open.c:1014)\n...\n\nFreed by task 1548:\n...\nkfree (mm/slab_common.c:1021)\nvc_port_destruct (drivers/tty/vt/vt.c:1094)\ntty_port_destructor (drivers/tty/tty_port.c:296)\ntty_port_put (drivers/tty/tty_port.c:312)\nvt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))\nvt_ioctl (drivers/tty/vt/vt_ioctl.c:903)\ntty_ioctl (drivers/tty/tty_io.c:2776)\n...\n\nThe buggy address belongs to the object at ffff888113747800\n  which belongs to the cache kmalloc-1k of size 1024\nThe buggy address is located 424 bytes inside of\n  1024-byte region [ffff888113747800, ffff888113747c00)\n\nThe buggy address belongs to the physical page:\npage:00000000b3fe6c7c refcount:1 mapcount:0 mapping:0000000000000000\n     index:0x0 pfn:0x113740\nhead:00000000b3fe6c7c order:3 compound_mapcount:0 subpages_mapcount:0\n     compound_pincount:0\nanon flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\nraw: 0017ffffc0010200 ffff888100042dc0 0000000000000000 dead000000000001\nraw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n  ffff888113747880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff888113747900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\u003e ffff888113747980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                                   ^\n  ffff888113747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff888113747a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n==================================================================\nDisabling lock debugging due to kernel taint"
        }
      ],
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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 vulnerability is reached via open/read on /dev/vcs* character devices (vcs_read), which requires local system access through the VFS syscall path, not network or adjacent network access.\nAC:L - The attacker controls both sides of the race\u2014one thread reading a large buffer from /dev/vcsN and another issuing VT_DISALLOCATE on a VT tty\u2014so success does not depend on conditions outside attacker influence.\nPR:L - Exploitation needs only an unprivileged local account with access to a VT tty and /dev/vcs* (e.g., tty group or console login); VT_DISALLOCATE notably performs no perm/capability check, so real root is not required.\nUI:N - The attacker opens the devices and triggers the race themselves with no action required from another user.\nS:U - This is a standard in-kernel use-after-free enabling privilege escalation within the same kernel security authority, with no VM escape or cross-boundary impact.\nC:H - Use-after-free of the kmalloc-1k vc_data object allows heap spraying so subsequent vcs_size/vcs_read_buf accesses can disclose arbitrary kernel memory to userspace.\nI:H - Kernel UAF of a sprayed slab object enables classic heap exploitation primitives for arbitrary write and control-flow hijacking beyond a mere crash.\nA:H - The UAF reliably produces KASAN-detectable use-after-free faults and can cause kernel oops/panic when the freed vc_data is dereferenced."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:12:11.113Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066"
        },
        {
          "url": "https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18"
        },
        {
          "url": "https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df"
        },
        {
          "url": "https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34"
        }
      ],
      "title": "vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52973",
    "datePublished": "2025-03-27T16:43:12.756Z",
    "dateReserved": "2025-03-27T16:40:15.737Z",
    "dateUpdated": "2026-08-05T09:12:11.113Z",
    "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.

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