CVE-2025-38441 in Linux
Sumário
de VulDB • 12/09/2026
No kernel do Linux, a seguinte vulnerabilidade foi resolvida:
netfilter: flowtable: considerar o cabeçalho Ethernet em nf_flow_pppoe_proto()
O syzbot encontrou um possível acesso a valor não inicializado (uninit-value) em nf_flow_pppoe_proto().
A commit responsável pelo erro esqueceu-se do cabeçalho Ethernet.
BUG: KMSAN: uninit-value em nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623 nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline]
nf_ingress net/core/dev.c:5742 [inline]
__netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837 __netif_receive_skb_one_core net/core/dev.c:5975 [inline]
__netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090 netif_receive_skb_internal net/core/dev.c:6176 [inline]
netif_receive_skb+0x57/0x630 net/core/dev.c:6235 tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485 tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 new_sync_write fs/read_write.c:593 [inline]
vfs_write+0xb4b/0x1580 fs/read_write.c:686 ksys_write fs/read_write.c:738 [inline]
__do_sys_write fs/read_write.c:749 [inline]
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