CVE-2024-26834

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nft_flow_offload: release dst in case direct xmit path is used<br /> <br /> Direct xmit does not use it since it calls dev_queue_xmit() to send<br /> packets, hence it calls dst_release().<br /> <br /> kmemleak reports:<br /> <br /> unreferenced object 0xffff88814f440900 (size 184):<br /> comm "softirq", pid 0, jiffies 4294951896<br /> hex dump (first 32 bytes):<br /> 00 60 5b 04 81 88 ff ff 00 e6 e8 82 ff ff ff ff .`[.............<br /> 21 0b 50 82 ff ff ff ff 00 00 00 00 00 00 00 00 !.P.............<br /> backtrace (crc cb2bf5d6):<br /> [] kmem_cache_alloc+0x286/0x340<br /> [] dst_alloc+0x43/0xb0<br /> [] rt_dst_alloc+0x2e/0x190<br /> [] __mkroute_output+0x244/0x980<br /> [] ip_route_output_flow+0xc0/0x160<br /> [] nf_ip_route+0xf/0x30<br /> [] nf_route+0x2d/0x60<br /> [] nft_flow_route+0x171/0x6a0 [nft_flow_offload]<br /> [] nft_flow_offload_eval+0x4e8/0x700 [nft_flow_offload]<br /> [] expr_call_ops_eval+0x53/0x330 [nf_tables]<br /> [] nft_do_chain+0x17c/0x840 [nf_tables]<br /> [] nft_do_chain_inet+0xa1/0x210 [nf_tables]<br /> [] nf_hook_slow+0x5b/0x160<br /> [] ip_forward+0x8b6/0x9b0<br /> [] ip_rcv+0x221/0x230<br /> [] __netif_receive_skb_one_core+0xfe/0x110