CVE-2024-46717 net/mlx5e: SHAMPO, Fix incorrect page release
A use-after-free vulnerability in the Linux kernel mlx5e driver allows attackers to cause denial of service or potentially execute code via incorrect page release logic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-46717?
CVE-2024-46717 is a critical use after free vulnerability in Linux kernel, published on 18 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: SHAMPO, Fix incorrect page release
Under the following conditions: 1) No skb created yet 2) header_size == 0 (no SHAMPO header) 3) header_index + 1 % MLX5E_SHAMPO_WQ_HEADER_PER_PAGE == 0 (this is the last page fragment of a SHAMPO header page)
a new skb is formed with a page that is NOT a SHAMPO header page (it is a regular data page). Further down in the same function (mlx5e_handle_rx_cqe_mpwrq_shampo()), a SHAMPO header page from header_index is released. This is wrong and it leads to SHAMPO header pages being released more than once.
Which versions are affected by CVE-2024-46717?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-46717?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-46717 being exploited?
There is no known exploitation of CVE-2024-46717 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68346, BELL-CVE-2024-46717, DEBIAN-CVE-2024-46717, GHSA-xp2m-m27g-f466, ROOT-OS-DEBIAN-11-CVE-2024-46717, ROOT-OS-UBUNTU-2204-CVE-2024-46717 and 1 more.