CVE-2024-35939

dma-direct: Leak pages on dma_set_decrypted() failure

Description

In the Linux kernel, the following vulnerability has been resolved: dma-direct: Leak pages on dma_set_decrypted() failure On TDX it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues. DMA could free decrypted/shared pages if dma_set_decrypted() fails. This should be a rare case. Just leak the pages in this case instead of freeing them.

N/A

CVSS

Severity:

EPSS 0.13%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/4e0cfb25d49da2e6261ad582f58ffa5b5dd8c8e9
https://git.kernel.org/stable/c/4031b72ca747a1e6e9ae4fa729e765b43363d66a
https://git.kernel.org/stable/c/b57326c96b7bc7638aa8c44e12afa2defe0c934c
https://git.kernel.org/stable/c/b9fa16949d18e06bdf728a560f5c8af56d2bdcaf

Frequently Asked Questions

What is the severity of CVE-2024-35939?: CVE-2024-35939 has not yet been assigned a CVSS score.
How to fix CVE-2024-35939?: To fix CVE-2024-35939, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-35939 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-35939 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-35939?: CVE-2024-35939 affects Linux Linux, Linux Linux.

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