CVE-2024-53088 i40e: fix race condition by adding filter's intermediate sync state
A race condition in the i40e network driver can corrupt MAC/VLAN filters, leading to memory corruption and potential denial of service.
- 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-2024-53088?
CVE-2024-53088 is a high-severity vulnerability in Linux kernel, published on 19 Nov 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:
i40e: fix race condition by adding filter's intermediate sync state
Fix a race condition in the i40e driver that leads to MAC/VLAN filters becoming corrupted and leaking. Address the issue that occurs under heavy load when multiple threads are concurrently modifying MAC/VLAN filters by setting mac and port VLAN.
1. Thread T0 allocates a filter in i40e_add_filter() within i40e_ndo_set_vf_port_vlan(). 2. Thread T1 concurrently frees the filter in __i40e_del_filter() within i40e_ndo_set_vf_mac(). 3. Subsequently, i40e_service_task() calls i40e_sync_vsi_filters(), which refers to the already freed filter memory, causing corruption.
Reproduction steps: 1. Spawn multiple VFs. 2. Apply a concurrent heavy load by running parallel operations to change MAC addresses on the VFs and change port VLANs on the host. 3. Observe errors in dmesg: "Error I40E_AQ_RC_ENOSPC adding RX filters on VF XX, please set promiscuous on manually for VF XX".
Exact code for stable reproduction Intel can't open-source now.
The fix involves implementing a new intermediate filter state, I40E_FILTER_NEW_SYNC, for the time when a filter is on a tmp_add_list. These filters cannot be deleted from the hash list directly but must be removed using the full process.
Weakness: CWE-362
Which versions are affected by CVE-2024-53088?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53088?
Apply the vendor's patch.
Is CVE-2024-53088 being exploited?
There is no known exploitation of CVE-2024-53088 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53912, AZL-53954, BELL-CVE-2024-53088, DEBIAN-CVE-2024-53088, GHSA-9w8f-6h5p-xj5x, ROOT-OS-DEBIAN-11-CVE-2024-53088 and 1 more.