Description

In the Linux kernel, the following vulnerability has been resolved:

bpf: Check bloom filter map value size

This patch adds a missing check to bloom filter creating, rejecting
values above KMALLOC_MAX_SIZE. This brings the bloom map in line with
many other map types.

The lack of this protection can cause kernel crashes for value sizes
that overflow int's. Such a crash was caught by syzkaller. The next
patch adds more guard-rails at a lower level.

Classification

CVE ID: CVE-2024-36918

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.83% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/fa6995eeb62e74b5a1480c73fb7b420c270784d3
https://git.kernel.org/stable/c/608e13706c8b6c658a0646f09ebced74ec367f7c
https://git.kernel.org/stable/c/c418afb9bf23e2f2b76cb819601e4a5d9dbab42d
https://git.kernel.org/stable/c/a8d89feba7e54e691ca7c4efc2a6264fa83f3687

Timeline