CVE-2024-50298 net: enetc: allocate vf_state during PF probes
A null pointer dereference in the Linux kernel enetc driver allows local attackers to cause a system crash by setting a VF MAC address before enabling VFs.
- 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-2024-50298?
CVE-2024-50298 is a medium-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:
net: enetc: allocate vf_state during PF probes
In the previous implementation, vf_state is allocated memory only when VF is enabled. However, net_device_ops::ndo_set_vf_mac() may be called before VF is enabled to configure the MAC address of VF. If this is the case, enetc_pf_set_vf_mac() will access vf_state, resulting in access to a null pointer. The simplified error log is as follows.
root@ls1028ardb:~# ip link set eno0 vf 1 mac 00:0c:e7:66:77:89 [ 173.543315] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 [ 173.637254] pc : enetc_pf_set_vf_mac+0x3c/0x80 Message from sy [ 173.641973] lr : do_setlink+0x4a8/0xec8 [ 173.732292] Call trace: [ 173.734740] enetc_pf_set_vf_mac+0x3c/0x80 [ 173.738847] __rtnl_newlink+0x530/0x89c [ 173.742692] rtnl_newlink+0x50/0x7c [ 173.746189] rtnetlink_rcv_msg+0x128/0x390 [ 173.750298] netlink_rcv_skb+0x60/0x130 [ 173.754145] rtnetlink_rcv+0x18/0x24 [ 173.757731] netlink_unicast+0x318/0x380 [ 173.761665] netlink_sendmsg+0x17c/0x3c8
Weakness: CWE-476
Which versions are affected by CVE-2024-50298?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50298?
Apply the vendor's patch.
Is CVE-2024-50298 being exploited?
There is no known exploitation of CVE-2024-50298 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-53468, AZL-53781, BELL-CVE-2024-50298, DEBIAN-CVE-2024-50298, GHSA-fm8p-9649-2gq7, ROOT-OS-DEBIAN-11-CVE-2024-50298 and 3 more.