Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.13, < 5.10.132 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1Patch
- https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5eaPatch
- https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293Patch
- https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19dfPatch
FAQ
What is CVE-2022-49640?
CVE-2022-49640 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 dat...
How severe is CVE-2022-49640?
CVE-2022-49640 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49640?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.