Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have been exhausted by existing regions, and creating a new region with the port in question in it's hierarchical path is attempted, cxl_port_attach_region() fails to find a port decoder (as would be expected), and drops into the failure / cleanup path. However, during cleanup of the region reference, a sanity check attempts to dereference the decoder, which in the above case didn't exist. This causes a NULL pointer dereference BUG. To fix this, refactor the decoder allocation and de-allocation into helper routines, and in this 'free' routine, check that the decoder, @cxld, is valid before attempting any operations on it.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.0, < 6.0.8 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/71ee71d7adcba648077997a29a91158d20c40b09Patch
- https://git.kernel.org/stable/c/c6813b5610ac53af73edd87a660d23a0511faa47Patch
FAQ
What is CVE-2022-49895?
CVE-2022-49895 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix decoder allocation crash When an intermediate port's decoders have been exhausted by existing regions, and creatin...
How severe is CVE-2022-49895?
CVE-2022-49895 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-2022-49895?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.