Addressing Out-of-Bounds Access in the Linux Kernel's dm Cache

CVE-2024-50278

What is CVE-2024-50278?

An issue has been identified within the Linux kernel where an out-of-bounds access may occur during the manipulation of device mapper cache functions. This vulnerability arises when the fast device unexpectedly expands before the cache table resumes for the first time. The core problem lies in the lack of size check during this initial resume, leading to potential memory corruption. During a scenario where in-core data structures are inadequately allocated following a cache expansion, an out-of-bounds read can occur, potentially exposing sensitive information or causing system instability. Users and administrators should remain vigilant and apply the necessary updates to mitigate any associated risks.

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