veth: manage XDP program pointers during channel resize

Summary

In the Linux kernel, the following vulnerability has been resolved: veth: manage XDP program pointers during channel resize veth_set_channels() tears down XDP resources for removed RX queues without clearing rq->xdp_prog. If the program is then detached or replaced, those queues keep the old pointer after bpf_prog_put(). A later channel increase can re-enable NAPI and run the freed program. BUG: unable to handle page fault for address: ffffc90000256048 Oops: Oops: 0000 [#1] SMP KASAN NOPTI RIP: veth_xdp_rcv_skb (include/linux/filter.h:779 include/net/xdp.h:696 drivers/net/veth.c:820) Call Trace: veth_xdp_rcv (drivers/net/veth.c:941) veth_poll (drivers/net/veth.c:986) __napi_poll (net/core/dev.c:7787) net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007) handle_softirqs (kernel/softirq.c:645) Kernel panic - not syncing: Fatal exception in interrupt

Timeline

1. Oct 9, 2026, 7:34 AM UTCCVE published
2. Oct 24, 2026, 2:08 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 7a8e143109ff2736dc79e41dcd55af7ceab7520a; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 1a5c5b9c64ba5f39dba55da6e12561ca56eeb758; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 25bb7c36225220d30f404d7e29d2e052bc5f4b99; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 43f6b647f209591b1e3f726bb16b8dcba6b95908; From 4752eeb3d891c27905a8fdf4d80e899c0efd4ec7 · fixed in 7104a370714346b667712913dc16abf14bbc97ed

• Linux Linux

  5.15

• KernelLinux

  From 5.15.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9

References 7