CVE-2024-35903 x86/bpf: Fix IP after emitting call depth accounting

Medium 5.5 Published Updated

A bug in the Linux kernel's x86 BPF JIT compiler causes incorrect instruction pointer handling, leading to system crashes.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2024-35903?

CVE-2024-35903 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

x86/bpf: Fix IP after emitting call depth accounting

Adjust the IP passed to `emit_patch` so it calculates the correct offset for the CALL instruction if `x86_call_depth_emit_accounting` emits code. Otherwise we will skip some instructions and most likely crash.

Which versions are affected by CVE-2024-35903?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-35903?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-35903 being exploited?

There is no known exploitation of CVE-2024-35903 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as BELL-CVE-2024-35903, DEBIAN-CVE-2024-35903, GHSA-jpcq-3j3m-gh3m, UBUNTU-CVE-2024-35903.

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