CVE-2024-56615

Summary

CVE-2024-56615 is a vulnerability affecting the Linux kernel that has been resolved. The issue involves out-of-bound (OOB) writes in the bpf and devmap subsystems. The root cause is the use of signed integers for indices, leading to OOB accesses when deleting elements. To mitigate this, the data types have been changed from int to u32. An example of the issue can be seen in the kernel error message provided, where a not-present page fault occurs due to an OOB access. The vulnerability also affects the iterator variable used when iterating through map entries during the map release process, resulting in additional OOB accesses. The fix involves changing the iterator variable to u32 as well.

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