CVE-2024-36918: linux kernel Integer Overflow — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.16 — 6.1.91
linux	linux_kernel	6.2 — 6.6.31
linux	linux_kernel	6.7 — 6.8.10
linux	linux_kernel	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2024-36918? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36918? +

CVE-2024-36918 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-36918? +

CVE-2024-36918 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-36918? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-36918