CVE-2024-53120 net/mlx5e: CT: Fix null-ptr-deref in add rule err flow
A null pointer dereference in the Linux kernel's Mellanox mlx5 driver can cause a system crash when adding connection tracking rules fails.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-53120?
CVE-2024-53120 is a high-severity vulnerability in Linux kernel, published on 2 Dec 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: CT: Fix null-ptr-deref in add rule err flow
In error flow of mlx5_tc_ct_entry_add_rule(), in case ct_rule_add() callback returns error, zone_rule->attr is used uninitiated. Fix it to use attr which has the needed pointer value.
Kernel log: BUG: kernel NULL pointer dereference, address: 0000000000000110 RIP: 0010:mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core] … Call Trace: <TASK> ? __die+0x20/0x70 ? page_fault_oops+0x150/0x3e0 ? exc_page_fault+0x74/0x140 ? asm_exc_page_fault+0x22/0x30 ? mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core] ? mlx5_tc_ct_entry_add_rule+0x1d5/0x2f0 [mlx5_core] mlx5_tc_ct_block_flow_offload+0xc6a/0xf90 [mlx5_core] ? nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table] nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table] flow_offload_work_handler+0x142/0x320 [nf_flow_table] ? finish_task_switch.isra.0+0x15b/0x2b0 process_one_work+0x16c/0x320 worker_thread+0x28c/0x3a0 ? __pfx_worker_thread+0x10/0x10 kthread+0xb8/0xf0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2d/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK>
Weakness: CWE-476
Which versions are affected by CVE-2024-53120?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53120?
Apply the vendor's patch.
Is CVE-2024-53120 being exploited?
There is no known exploitation of CVE-2024-53120 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54207, AZL-54227, BELL-CVE-2024-53120, DEBIAN-CVE-2024-53120, GHSA-fvhh-6wh3-m386, UBUNTU-CVE-2024-53120.