Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. msc313_rtc_probe() was passing clk_disable_unprepare() directly, which did not have matching prototypes for devm_add_action_or_reset()'s callback argument. Refactor to use devm_clk_get_enabled() instead. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.16, < 6.0.17 |
References
- https://git.kernel.org/stable/c/21b8a1dd56a163825e5749b303858fb902ebf198Patch
- https://git.kernel.org/stable/c/5affaaf3334c9274131dae889ed79ea0553d61b4Patch
- https://git.kernel.org/stable/c/ba50fee6b41bcbafaeed3c51f90d37d1480ff9a0Patch
FAQ
What is CVE-2022-50322?
CVE-2022-50322 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CL...
How severe is CVE-2022-50322?
CVE-2022-50322 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-50322?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.