VYPR
← All advisories
Unrated severityNVD Advisory· Published Jun 18, 2025· Updated Sep 3, 2025

dma-buf/dma-resv: check if the new fence is really later

CVE-2022-49935

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

37

Patches

Vulnerability mechanics

References

2

News mentions

0

No linked articles in our index yet.