Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dma-buf/dma-resv: check if the new fence is really later Previously when we added a fence to a dma_resv object we always assumed the the newer than all the existing fences. With Jason's work to add an UAPI to explicit export/import that's not necessary the case any more. So without this check we would allow userspace to force the kernel into an use after free error. Since the change is very small and defensive it's probably a good idea to backport this to stable kernels as well just in case others are using the dma_resv object in the same way.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.0, < 5.19.8 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/a3f7c10a269d5b77dd5822ade822643ced3057f0Patch
- https://git.kernel.org/stable/c/c4c798fe98adceb642050819cb57cbc8f5c27870Patch
FAQ
What is CVE-2022-49935?
CVE-2022-49935 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: dma-buf/dma-resv: check if the new fence is really later Previously when we added a fence to a dma_resv object we always assumed t...
How severe is CVE-2022-49935?
CVE-2022-49935 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49935?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.