CVE-2024-50298

net: enetc: allocate vf_state during PF probes

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

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/ef0edfbe9eeed1fccad7cb705648af5222664944 patch
https://git.kernel.org/stable/c/7eb923f8d4819737c07d6a8d0daef0a4d7f99e0c patch
https://git.kernel.org/stable/c/e15c5506dd39885cd047f811a64240e2e8ab401b patch

Frequently Asked Questions

What is the severity of CVE-2024-50298?
CVE-2024-50298 has been scored as a medium severity vulnerability.
How to fix CVE-2024-50298?
To fix CVE-2024-50298, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-50298 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-50298 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-50298?
CVE-2024-50298 affects Linux Linux, Linux Linux.
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