CVE-2024-50091: dm vdo: don't refer to dedupe_context after releasing it

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-05 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: dm vdo: don't refer to dedupe_context after releasing it Clear the dedupe_context pointer in a data_vio whenever ownership of the context is lost, so that vdo can't examine it accidentally.

Affected products

Linux kernel: before 6.11.4 — fixed in 6.11.4

How to fix

Upgrade to a fixed version: Linux kernel 6.11.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0808ebf2f80b962e75741a41ced372a7116f1e26
https://git.kernel.org/stable/c/63ef073084c67878d7a92e15ad055172da3f05a3

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