[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2022-50679":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":14,"duplicates":31,"related":32,"reserved_at":9,"published_at":37,"modified_at":38,"state":39,"summary":40,"references_raw":44,"kevs":63,"epss":64,"epss_history":67,"metrics":336,"affected":337},"CVE-2022-50679","In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix DMA mappings leak\n\nDuring reallocation of RX buffers, new DMA mappings are created for\nthose buffers.\n\nsteps for reproduction:\nwhile :\ndo\nfor ((i=0; i\u003C=8160; i=i+32))\ndo\nethtool -G enp130s0f0 rx $i tx $i\nsleep 0.5\nethtool -g enp130s0f0\ndone\ndone\n\nThis resulted in crash:\ni40e 0000:01:00.1: Unable to allocate memory for the Rx descriptor ring, size=65536\nDriver BUG\nWARNING: CPU: 0 PID: 4300 at net/core/xdp.c:141 xdp_rxq_info_unreg+0x43/0x50\nCall Trace:\ni40e_free_rx_resources+0x70/0x80 [i40e]\ni40e_set_ringparam+0x27c/0x800 [i40e]\nethnl_set_rings+0x1b2/0x290\ngenl_family_rcv_msg_doit.isra.15+0x10f/0x150\ngenl_family_rcv_msg+0xb3/0x160\n? rings_fill_reply+0x1a0/0x1a0\ngenl_rcv_msg+0x47/0x90\n? genl_family_rcv_msg+0x160/0x160\nnetlink_rcv_skb+0x4c/0x120\ngenl_rcv+0x24/0x40\nnetlink_unicast+0x196/0x230\nnetlink_sendmsg+0x204/0x3d0\nsock_sendmsg+0x4c/0x50\n__sys_sendto+0xee/0x160\n? handle_mm_fault+0xbe/0x1e0\n? syscall_trace_enter+0x1d3/0x2c0\n__x64_sys_sendto+0x24/0x30\ndo_syscall_64+0x5b/0x1a0\nentry_SYSCALL_64_after_hwframe+0x65/0xca\nRIP: 0033:0x7f5eac8b035b\nMissing register, driver bug\nWARNING: CPU: 0 PID: 4300 at net/core/xdp.c:119 xdp_rxq_info_unreg_mem_model+0x69/0x140\nCall Trace:\nxdp_rxq_info_unreg+0x1e/0x50\ni40e_free_rx_resources+0x70/0x80 [i40e]\ni40e_set_ringparam+0x27c/0x800 [i40e]\nethnl_set_rings+0x1b2/0x290\ngenl_family_rcv_msg_doit.isra.15+0x10f/0x150\ngenl_family_rcv_msg+0xb3/0x160\n? rings_fill_reply+0x1a0/0x1a0\ngenl_rcv_msg+0x47/0x90\n? genl_family_rcv_msg+0x160/0x160\nnetlink_rcv_skb+0x4c/0x120\ngenl_rcv+0x24/0x40\nnetlink_unicast+0x196/0x230\nnetlink_sendmsg+0x204/0x3d0\nsock_sendmsg+0x4c/0x50\n__sys_sendto+0xee/0x160\n? handle_mm_fault+0xbe/0x1e0\n? syscall_trace_enter+0x1d3/0x2c0\n__x64_sys_sendto+0x24/0x30\ndo_syscall_64+0x5b/0x1a0\nentry_SYSCALL_64_after_hwframe+0x65/0xca\nRIP: 0033:0x7f5eac8b035b\n\nThis was caused because of new buffers with different RX ring count should\nsubstitute older ones, but those buffers were freed in\ni40e_configure_rx_ring and reallocated again with i40e_alloc_rx_bi,\nthus kfree on rx_bi caused leak of already mapped DMA.\n\nFix this by reallocating ZC with rx_bi_zc struct when BPF program loads. Additionally\nreallocate back to rx_bi when BPF program unloads.\n\nIf BPF program is loaded/unloaded and XSK pools are created, reallocate\nRX queues accordingly in XSP_SETUP_XSK_POOL 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