CVE-2024-47708

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux401cb7dae8130fd34eb84648e02ab4c506df7d5e < 182c6fed8c7f62cddce0126ec1fc0da2b700fb11affected
LinuxLinux401cb7dae8130fd34eb84648e02ab4c506df7d5e < 157f29152b61ca41809dd7ead29f5733adeced19affected
LinuxLinux6.11affected
LinuxLinux0 < 6.11unaffected
LinuxLinux6.11.2 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References