Vulnerability-Lookup

BDU:2026-03731 (CVE-2022-49910)

Vulnerability from fstec – Published: 2026-03-25 – Updated: 2026-03-25 – View on bdu.fstec.ru Fixed

Title

Уязвимость функций l2cap_rx_state_recv() и l2cap_rx() модуля net/bluetooth/l2cap_core.c подсистемы Bluetooth ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Summary

Уязвимость функций l2cap_rx_state_recv() и l2cap_rx() модуля net/bluetooth/l2cap_core.c подсистемы Bluetooth ядра операционной системы Linux связана с повторным использованием ранее освобожденной памяти. Эксплуатация уязвимости может позволить нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

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-416 - Использование после освобождения

Aliases

CVE-2022-49910

References

19 references

URL
https://git.kernel.org/stable/c/dc30e05bb18852303084430c03ca76e69257d9ea
https://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f
https://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569
https://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1
https://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d
https://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde
https://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2
https://www.cve.org/CVERecord?id=CVE-2022-49910
https://git.kernel.org/linus/3aff8aaca4e36dc8b17eaa011684881a80238966
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.333
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.299
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.265
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.224
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.154
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.78
https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.8
https://access.redhat.com/security/cve/cve-2022-49910
https://security-tracker.debian.org/tracker/CVE-2022-49910
https://ubuntu.com/security/CVE-2022-49910

Impacted products

4 products from 4 vendors

Vendors

Red Hat, Inc., Canonical Ltd., Сообщество свободного программного обеспечения

Products

Red Hat Enterprise Linux, Ubuntu, Debian GNU/Linux, Linux

Versions

7 (Red Hat Enterprise Linux), 16.04 LTS (Ubuntu), 18.04 LTS (Ubuntu), 8 (Red Hat Enterprise Linux), 20.04 LTS (Ubuntu), 11 (Debian GNU/Linux), 22.04 LTS (Ubuntu), от 5.16 до 6.0.7 включительно (Linux), от 4.10 до 4.14.298 включительно (Linux), от 4.15 до 4.19.264 включительно (Linux), от 4.20 до 5.4.223 включительно (Linux), от 5.5 до 5.10.153 включительно (Linux), от 5.11 до 5.15.77 включительно (Linux), от 3.6 до 4.9.332 включительно (Linux)

Product types

Operating system

Platforms

Red Hat, Inc. Red Hat Enterprise Linux 7, Canonical Ltd. Ubuntu 16.04 LTS, Canonical Ltd. Ubuntu 18.04 LTS, Inc. Red Hat Enterprise Linux 8, Canonical Ltd. Ubuntu 20.04 LTS, Сообщество свободного программного обеспечения Debian GNU/Linux 11, Canonical Ltd. Ubuntu 22.04 LTS, Сообщество свободного программного обеспечения Linux от 5.16 до 6.0.7 включительно, Сообщество свободного программного обеспечения Linux от 4.10 до 4.14.298 включительно, Сообщество свободного программного обеспечения Linux от 4.15 до 4.19.264 включительно, Сообщество свободного программного обеспечения Linux от 4.20 до 5.4.223 включительно, Сообщество свободного программного обеспечения Linux от 5.5 до 5.10.153 включительно, Сообщество свободного программного обеспечения Linux от 5.11 до 5.15.77 включительно, Сообщество свободного программного обеспечения Linux от 3.6 до 4.9.332 включительно

Mitigations

В условиях отсутствия обновлений безопасности от производителя рекомендуется придерживаться "Рекомендаций по безопасной настройке операционных систем LINUX", изложенных в методическом документе ФСТЭК России, утверждённом 25 декабря 2022 года. Использование рекомендаций: Для Linux: https://git.kernel.org/stable/c/dc30e05bb18852303084430c03ca76e69257d9ea https://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f https://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569 https://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1 https://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d https://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde https://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2 Для программных продуктов Red Hat Inc.: https://access.redhat.com/security/cve/cve-2022-49910 Для программных продуктов Debian GNU/Linux: https://security-tracker.debian.org/tracker/CVE-2022-49910 Для программных продуктов Ubuntu: https://ubuntu.com/security/CVE-2022-49910

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,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Red Hat, Inc., Canonical Ltd., \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "7 (Red Hat Enterprise Linux), 16.04 LTS (Ubuntu), 18.04 LTS (Ubuntu), 8 (Red Hat Enterprise Linux), 20.04 LTS (Ubuntu), 11 (Debian GNU/Linux), 22.04 LTS (Ubuntu), \u043e\u0442 5.16 \u0434\u043e 6.0.7 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.10 \u0434\u043e 4.14.298 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.264 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.223 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.5 \u0434\u043e 5.10.153 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.15.77 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 3.6 \u0434\u043e 4.9.332 \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://git.kernel.org/stable/c/dc30e05bb18852303084430c03ca76e69257d9ea\nhttps://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f\nhttps://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569\nhttps://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1\nhttps://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d\nhttps://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde\nhttps://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2\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-2022-49910\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 Debian GNU/Linux:\nhttps://security-tracker.debian.org/tracker/CVE-2022-49910\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-2022-49910",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "02.11.2022",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "25.03.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "25.03.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-03731",
  "\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-2022-49910",
  "\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": "Red Hat Enterprise Linux, Ubuntu, Debian GNU/Linux, Linux",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Red Hat, Inc. Red Hat Enterprise Linux 7 , 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 , Canonical Ltd. Ubuntu 22.04 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 Linux \u043e\u0442 5.16 \u0434\u043e 6.0.7 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.10 \u0434\u043e 4.14.298 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.15 \u0434\u043e 4.19.264 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 4.20 \u0434\u043e 5.4.223 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.5 \u0434\u043e 5.10.153 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.11 \u0434\u043e 5.15.77 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 3.6 \u0434\u043e 4.9.332 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0439 l2cap_rx_state_recv() \u0438 l2cap_rx() \u043c\u043e\u0434\u0443\u043b\u044f net/bluetooth/l2cap_core.c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b Bluetooth \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 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u043d\u0430 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\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\u0439 l2cap_rx_state_recv() \u0438 l2cap_rx() \u043c\u043e\u0434\u0443\u043b\u044f net/bluetooth/l2cap_core.c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b Bluetooth \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 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u044b\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0440\u0430\u043d\u0435\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \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 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u043d\u0430 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\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/dc30e05bb18852303084430c03ca76e69257d9ea\nhttps://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f\nhttps://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569\nhttps://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1\nhttps://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d\nhttps://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde\nhttps://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2\nhttps://www.cve.org/CVERecord?id=CVE-2022-49910\nhttps://git.kernel.org/linus/3aff8aaca4e36dc8b17eaa011684881a80238966\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.333\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.299\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.265\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.224\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.154\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.78\nhttps://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.8\nhttps://access.redhat.com/security/cve/cve-2022-49910\nhttps://security-tracker.debian.org/tracker/CVE-2022-49910\nhttps://ubuntu.com/security/CVE-2022-49910",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-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 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-2022-49910 (GCVE-0-2022-49910)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-08-05 08:56

Title

Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu Fix the race condition between the following two flows that run in parallel: 1. l2cap_reassemble_sdu -> chan->ops->recv (l2cap_sock_recv_cb) -> __sock_queue_rcv_skb. 2. bt_sock_recvmsg -> skb_recv_datagram, skb_free_datagram. An SKB can be queued by the first flow and immediately dequeued and freed by the second flow, therefore the callers of l2cap_reassemble_sdu can't use the SKB after that function returns. However, some places continue accessing struct l2cap_ctrl that resides in the SKB's CB for a short time after l2cap_reassemble_sdu returns, leading to a use-after-free condition (the stack trace is below, line numbers for kernel 5.19.8). Fix it by keeping a local copy of struct l2cap_ctrl. BUG: KASAN: use-after-free in l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth Read of size 1 at addr ffff88812025f2f0 by task kworker/u17:3/43169 Workqueue: hci0 hci_rx_work [bluetooth] Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4)) print_report.cold (mm/kasan/report.c:314 mm/kasan/report.c:429) ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth kasan_report (mm/kasan/report.c:162 mm/kasan/report.c:493) ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth l2cap_rx (net/bluetooth/l2cap_core.c:7236 net/bluetooth/l2cap_core.c:7271) bluetooth ret_from_fork (arch/x86/entry/entry_64.S:306) </TASK> Allocated by task 43169: kasan_save_stack (mm/kasan/common.c:39) __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469) kmem_cache_alloc_node (mm/slab.h:750 mm/slub.c:3243 mm/slub.c:3293) __alloc_skb (net/core/skbuff.c:414) l2cap_recv_frag (./include/net/bluetooth/bluetooth.h:425 net/bluetooth/l2cap_core.c:8329) bluetooth l2cap_recv_acldata (net/bluetooth/l2cap_core.c:8442) bluetooth hci_rx_work (net/bluetooth/hci_core.c:3642 net/bluetooth/hci_core.c:3832) bluetooth process_one_work (kernel/workqueue.c:2289) worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2437) kthread (kernel/kthread.c:376) ret_from_fork (arch/x86/entry/entry_64.S:306) Freed by task 27920: kasan_save_stack (mm/kasan/common.c:39) kasan_set_track (mm/kasan/common.c:45) kasan_set_free_info (mm/kasan/generic.c:372) ____kasan_slab_free (mm/kasan/common.c:368 mm/kasan/common.c:328) slab_free_freelist_hook (mm/slub.c:1780) kmem_cache_free (mm/slub.c:3536 mm/slub.c:3553) skb_free_datagram (./include/net/sock.h:1578 ./include/net/sock.h:1639 net/core/datagram.c:323) bt_sock_recvmsg (net/bluetooth/af_bluetooth.c:295) bluetooth l2cap_sock_recvmsg (net/bluetooth/l2cap_sock.c:1212) bluetooth sock_read_iter (net/socket.c:1087) new_sync_read (./include/linux/fs.h:2052 fs/read_write.c:401) vfs_read (fs/read_write.c:482) ksys_read (fs/read_write.c:620) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)

Severity

8.8 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/dc30e05bb18852303…
https://git.kernel.org/stable/c/03af22e23b96fb7ef…
https://git.kernel.org/stable/c/6c7407bfbeafc80a0…
https://git.kernel.org/stable/c/4cd094fd5d872862c…
https://git.kernel.org/stable/c/cb1c012099ef5904c…
https://git.kernel.org/stable/c/8278a87bb1eeea943…
https://git.kernel.org/stable/c/9a04161244603f502…
https://git.kernel.org/stable/c/3aff8aaca4e36dc8b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < dc30e05bb18852303084430c03ca76e69257d9ea (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 03af22e23b96fb7ef75fb7885407ef457e8b403d (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 6c7407bfbeafc80a04e6eaedcf34d378532a04f2 (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 4cd094fd5d872862ca278e15b9b51b07e915ef3f (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569 (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 8278a87bb1eeea94350d675ef961ee5a03341fde (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 9a04161244603f502c6e453913e51edd59cb70c1 (git) Affected: 4b51dae96731c9d82f5634e75ac7ffd3b9c1b060 , < 3aff8aaca4e36dc8b17eaa011684881a80238966 (git)
Linux	Linux	Affected: 3.6 Unaffected: 0 , < 3.6 (semver) Unaffected: 4.9.333 , ≤ 4.9.* (semver) Unaffected: 4.14.299 , ≤ 4.14.* (semver) Unaffected: 4.19.265 , ≤ 4.19.* (semver) Unaffected: 5.4.224 , ≤ 5.4.* (semver) Unaffected: 5.10.154 , ≤ 5.10.* (semver) Unaffected: 5.15.78 , ≤ 5.15.* (semver) Unaffected: 6.0.8 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dc30e05bb18852303084430c03ca76e69257d9ea",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "03af22e23b96fb7ef75fb7885407ef457e8b403d",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "6c7407bfbeafc80a04e6eaedcf34d378532a04f2",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "4cd094fd5d872862ca278e15b9b51b07e915ef3f",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "8278a87bb1eeea94350d675ef961ee5a03341fde",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "9a04161244603f502c6e453913e51edd59cb70c1",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            },
            {
              "lessThan": "3aff8aaca4e36dc8b17eaa011684881a80238966",
              "status": "affected",
              "version": "4b51dae96731c9d82f5634e75ac7ffd3b9c1b060",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "lessThan": "3.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.333",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.299",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.333",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.299",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.265",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.224",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.154",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.78",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.8",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu\n\nFix the race condition between the following two flows that run in\nparallel:\n\n1. l2cap_reassemble_sdu -\u003e chan-\u003eops-\u003erecv (l2cap_sock_recv_cb) -\u003e\n   __sock_queue_rcv_skb.\n\n2. bt_sock_recvmsg -\u003e skb_recv_datagram, skb_free_datagram.\n\nAn SKB can be queued by the first flow and immediately dequeued and\nfreed by the second flow, therefore the callers of l2cap_reassemble_sdu\ncan\u0027t use the SKB after that function returns. However, some places\ncontinue accessing struct l2cap_ctrl that resides in the SKB\u0027s CB for a\nshort time after l2cap_reassemble_sdu returns, leading to a\nuse-after-free condition (the stack trace is below, line numbers for\nkernel 5.19.8).\n\nFix it by keeping a local copy of struct l2cap_ctrl.\n\nBUG: KASAN: use-after-free in l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\nRead of size 1 at addr ffff88812025f2f0 by task kworker/u17:3/43169\n\nWorkqueue: hci0 hci_rx_work [bluetooth]\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4))\n print_report.cold (mm/kasan/report.c:314 mm/kasan/report.c:429)\n ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n kasan_report (mm/kasan/report.c:162 mm/kasan/report.c:493)\n ? l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n l2cap_rx_state_recv (net/bluetooth/l2cap_core.c:6906) bluetooth\n l2cap_rx (net/bluetooth/l2cap_core.c:7236 net/bluetooth/l2cap_core.c:7271) bluetooth\n ret_from_fork (arch/x86/entry/entry_64.S:306)\n \u003c/TASK\u003e\n\nAllocated by task 43169:\n kasan_save_stack (mm/kasan/common.c:39)\n __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469)\n kmem_cache_alloc_node (mm/slab.h:750 mm/slub.c:3243 mm/slub.c:3293)\n __alloc_skb (net/core/skbuff.c:414)\n l2cap_recv_frag (./include/net/bluetooth/bluetooth.h:425 net/bluetooth/l2cap_core.c:8329) bluetooth\n l2cap_recv_acldata (net/bluetooth/l2cap_core.c:8442) bluetooth\n hci_rx_work (net/bluetooth/hci_core.c:3642 net/bluetooth/hci_core.c:3832) bluetooth\n process_one_work (kernel/workqueue.c:2289)\n worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2437)\n kthread (kernel/kthread.c:376)\n ret_from_fork (arch/x86/entry/entry_64.S:306)\n\nFreed by task 27920:\n kasan_save_stack (mm/kasan/common.c:39)\n kasan_set_track (mm/kasan/common.c:45)\n kasan_set_free_info (mm/kasan/generic.c:372)\n ____kasan_slab_free (mm/kasan/common.c:368 mm/kasan/common.c:328)\n slab_free_freelist_hook (mm/slub.c:1780)\n kmem_cache_free (mm/slub.c:3536 mm/slub.c:3553)\n skb_free_datagram (./include/net/sock.h:1578 ./include/net/sock.h:1639 net/core/datagram.c:323)\n bt_sock_recvmsg (net/bluetooth/af_bluetooth.c:295) bluetooth\n l2cap_sock_recvmsg (net/bluetooth/l2cap_sock.c:1212) bluetooth\n sock_read_iter (net/socket.c:1087)\n new_sync_read (./include/linux/fs.h:2052 fs/read_write.c:401)\n vfs_read (fs/read_write.c:482)\n ksys_read (fs/read_write.c:620)\n do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The bug is reached by processing Bluetooth ACL/L2CAP I-frames in hci_rx_work \u2192 l2cap_recv_acldata \u2192 l2cap_data_rcv \u2192 l2cap_rx_state_recv/l2cap_stream_rx, which requires an attacker on the same Bluetooth segment.\nAC:L - An adjacent peer can reliably drive the receive path by sending ERTM/streaming I-frames on an established channel; on SMP, a normal blocking socket reader frees the skb in the race window the attacker creates, and a local app plus attacker-controlled peer can control both sides.\nPR:N - Exploitation is via unauthenticated Bluetooth L2CAP data handling in the kernel RX path; the adjacent attacker needs no privileges on the victim host (consistent with other Bluetooth L2CAP UAF scores).\nUI:N - No additional user action is required beyond an active L2CAP ERTM/streaming channel (for example RFCOMM or an already-paired/auto-connecting peer whose socket is being read by userspace).\nS:U - This is in-kernel heap UAF within the Bluetooth stack and does not cross a separate security authority such as a VM or IOMMU boundary.\nC:H - Use-after-free of the skb (including cb-resident l2cap_ctrl) enables heap reuse and arbitrary kernel memory disclosure primitives.\nI:H - Post-free use of control feeds l2cap_retransmit_all and channel sequence updates, so the UAF can be turned into heap corruption and control-flow hijacking.\nA:H - The UAF is a demonstrated KASAN use-after-free on the HCI RX workqueue and can cause kernel oops/panic even without full exploitation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:56:39.541Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dc30e05bb18852303084430c03ca76e69257d9ea"
        },
        {
          "url": "https://git.kernel.org/stable/c/03af22e23b96fb7ef75fb7885407ef457e8b403d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c7407bfbeafc80a04e6eaedcf34d378532a04f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/4cd094fd5d872862ca278e15b9b51b07e915ef3f"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb1c012099ef5904cd468bdb8d6fcdfdd9bcb569"
        },
        {
          "url": "https://git.kernel.org/stable/c/8278a87bb1eeea94350d675ef961ee5a03341fde"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a04161244603f502c6e453913e51edd59cb70c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/3aff8aaca4e36dc8b17eaa011684881a80238966"
        }
      ],
      "title": "Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49910",
    "datePublished": "2025-05-01T14:10:53.010Z",
    "dateReserved": "2025-05-01T14:05:17.247Z",
    "dateUpdated": "2026-08-05T08:56:39.541Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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

Detection rules are retrieved from Rulezet.

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

Related by attack behaviour

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