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.

The following products are affected by CVE-2022-49640 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2022-49640.

URL	Resource
https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1
https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea
https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293
https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df
https://lore.kernel.org/linux-cve-announce/2025022618-CVE-2022-49640-96ed@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49640
https://www.cve.org/CVERecord?id=CVE-2022-49640