Bug 2334363 (CVE-2024-53228)

Summary: CVE-2024-53228 kernel: riscv: kvm: Fix out-of-bounds array access
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2024-12-27 14:02:01 UTC 
In the Linux kernel, the following vulnerability has been resolved:

riscv: kvm: Fix out-of-bounds array access

In kvm_riscv_vcpu_sbi_init() the entry->ext_idx can contain an
out-of-bound index. This is used as a special marker for the base
extensions, that cannot be disabled. However, when traversing the
extensions, that special marker is not checked prior indexing the
array.

Add an out-of-bounds check to the function.
Comment 1 Avinash Hanwate 2024-12-28 14:33:26 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024122736-CVE-2024-53228-0c5f@gregkh/T