cbcvebase.
CVE-2022-50679
published 2025-12-09

CVE-2022-50679: In the Linux kernel, the following vulnerability has been resolved: i40e: Fix DMA mappings leak During reallocation of RX buffers, new DMA mappings are created…

PriorityP421low5.5
EPSS
0.24%
14.9th percentile
In the Linux kernel, the following vulnerability has been resolved: i40e: Fix DMA mappings leak During reallocation of RX buffers, new DMA mappings are created for those buffers. steps for reproduction: while : do for ((i=0; i<=8160; i=i+32)) do ethtool -G enp130s0f0 rx $i tx $i sleep 0.5 ethtool -g enp130s0f0 done done This resulted in crash: i40e 0000:01:00.1: Unable to allocate memory for the Rx descriptor ring, size=65536 Driver BUG WARNING: CPU: 0 PID: 4300 at net/core/xdp.c:141 xdp_rxq_info_unreg+0x43/0x50 Call Trace: i40e_free_rx_resources+0x70/0x80 [i40e] i40e_set_ringparam+0x27c/0x800 [i40e] ethnl_set_rings+0x1b2/0x290 genl_family_rcv_msg_doit.isra.15+0x10f/0x150 genl_family_rcv_msg+0xb3/0x160 ? rings_fill_reply+0x1a0/0x1a0 genl_rcv_msg+0x47/0x90 ? genl_family_rcv_msg+0x160/0x160 netlink_rcv_skb+0x4c/0x120 genl_rcv+0x24/0x40 netlink_unicast+0x196/0x230 netlink_sendmsg+0x204/0x3d0 sock_sendmsg+0x4c/0x50 __sys_sendto+0xee/0x160 ? handle_mm_fault+0xbe/0x1e0 ? syscall_trace_enter+0x1d3/0x2c0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x5b/0x1a0 entry_SYSCALL_64_after_hwframe+0x65/0xca RIP: 0033:0x7f5eac8b035b Missing register, driver bug WARNING: CPU: 0 PID: 4300 at net/core/xdp.c:119 xdp_rxq_info_unreg_mem_model+0x69/0x140 Call Trace: xdp_rxq_info_unreg+0x1e/0x50 i40e_free_rx_resources+0x70/0x80 [i40e] i40e_set_ringparam+0x27c/0x800 [i40e] ethnl_set_rings+0x1b2/0x290 genl_family_rcv_msg_doit.isra.15+0x10f/0x150 genl_family_rcv_msg+0xb3/0x160 ? rings_fill_reply+0x1a0/0x1a0 genl_rcv_msg+0x47/0x90 ? genl_family_rcv_msg+0x160/0x160 netlink_rcv_skb+0x4c/0x120 genl_rcv+0x24/0x40 netlink_unicast+0x196/0x230 netlink_sendmsg+0x204/0x3d0 sock_sendmsg+0x4c/0x50 __sys_sendto+0xee/0x160 ? handle_mm_fault+0xbe/0x1e0 ? syscall_trace_enter+0x1d3/0x2c0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x5b/0x1a0 entry_SYSCALL_64_after_hwframe+0x65/0xca RIP: 0033:0x7f5eac8b035b This was caused because of new buffers with different RX ring count should substitute older ones, but those

Affected

13 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.6-1 (bookworm)linux 6.0.6-1 (bookworm)
linuxlinux——
linuxlinux>= be1222b585fdc410b8c1dbcc57dd03a00f04eff5 < ed5baf3d0a33caaca4cd4073ebb0854cc77a616ded5baf3d0a33caaca4cd4073ebb0854cc77a616d
linuxlinux>= be1222b585fdc410b8c1dbcc57dd03a00f04eff5 < 94a171c982b8a8137a00721c1e62bc2713435bca94a171c982b8a8137a00721c1e62bc2713435bca
linuxlinux>= be1222b585fdc410b8c1dbcc57dd03a00f04eff5 < 5f499596dfa3db9b3172645b6de9e1096a669c955f499596dfa3db9b3172645b6de9e1096a669c95
linuxlinux>= be1222b585fdc410b8c1dbcc57dd03a00f04eff5 < aae425efdfd1b1d8452260a3cb49344ebf20b1f5aae425efdfd1b1d8452260a3cb49344ebf20b1f5
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 0 < 6.0.6-16.0.6-1
linuxlinux_kernel>= 5.11.0 < 5.15.765.15.76
linuxlinux_kernel>= 5.16.0 < 6.0.66.0.6
linuxlinux_kernel>= 5.8.0 < 5.10.1525.10.152
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