CVE-2022-49640

In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix data races in proc_douintvec_minmax(). A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing. This patch changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1	Patch
https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea	Patch
https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293	Patch
https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc3::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc4::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc5::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc6::::::

History

No history.

Information

Published : 2025-02-26 07:01

Updated : 2025-10-01 20:17

NVD link : CVE-2022-49640

Mitre link : CVE-2022-49640

CVE.ORG link : CVE-2022-49640

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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So, all readers and writers need some basic protection to\navoid load/store-tearing.\n\nThis patch changes proc_douintvec_minmax() to use READ_ONCE() and\nWRITE_ONCE() internally to fix data-races on the sysctl side. For now,\nproc_douintvec_minmax() itself is tolerant to a data-race, but we still\nneed to add annotations on the other subsystem's side."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sysctl: Se corrigen las ejecuciones de datos en proc_douintvec_minmax(). Se accede a una variable sysctl de forma concurrente y siempre existe la posibilidad de una ejecuci\u00f3n de datos. Por lo tanto, todos los lectores y escritores necesitan una protecci\u00f3n b\u00e1sica para evitar la rotura de la carga o el almacenamiento. Este parche cambia proc_douintvec_minmax() para que utilice READ_ONCE() y WRITE_ONCE() internamente para corregir las ejecuciones de datos en el lado de sysctl. 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