CVE-2024-35905 bpf: Protect against int overflow for stack access size
An integer overflow in the Linux kernel BPF verifier allows out-of-bounds memory access, potentially leading to code execution or privilege escalation.
- 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-2024-35905?
CVE-2024-35905 is a high-severity vulnerability in Debian Debian Linux, 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:
bpf: Protect against int overflow for stack access size
This patch re-introduces protection against the size of access to stack memory being negative; the access size can appear negative as a result of overflowing its signed int representation. This should not actually happen, as there are other protections along the way, but we should protect against it anyway. One code path was missing such protections (fixed in the previous patch in the series), causing out-of-bounds array accesses in check_stack_range_initialized(). This patch causes the verification of a program with such a non-sensical access size to fail.
This check used to exist in a more indirect way, but was inadvertendly removed in a833a17aeac7.
Which versions are affected by CVE-2024-35905?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2024-35905?
Apply the vendor's patch.
Is CVE-2024-35905 being exploited?
There is no known exploitation of CVE-2024-35905 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2024-35905, DEBIAN-CVE-2024-35905, GHSA-2m8j-fx85-xvhm, UBUNTU-CVE-2024-35905.