medium4.7
CVE-2022-49640
In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix data races in proc_douintvec_minmax().
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 4.13 before 5.10.132 from 5.11 before 5.15.56 from 5.16 before 5.18.13 Version 5.19 |
Weakness classification
References
- NVD record
- CVE.org record
- 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