CVE-2024-47708 Information

Description

In the Linux kernel the following vulnerability has been resolved:

netkit: Assign missing bpf_net_context

During the introduction of struct bpf_net_context handling for XDP-redirect the netkit driver has been missed which also requires it because NETKIT_REDIRECT invokes skb_do_redirect() which is accessing the per-CPU variables. Otherwise we see the following crash:

BUG: kernel NULL pointer dereference address: 0000000000000038
bpf_redirect()
netkit_xmit()
dev_hard_start_xmit()

Set the bpf_net_context before invoking netkit_xmit() program within the netkit driver.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://git.kernel.org/stable/c/182c6fed8c7f62cddce0126ec1fc0da2b700fb11 https://git.kernel.org/stable/c/157f29152b61ca41809dd7ead29f5733adeced19

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5