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CVE-2022-50679— i40e: Fix DMA mappings leak

EPSS 0.02% · P6
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I. Basic Information for CVE-2022-50679

Vulnerability Information
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Vulnerability Title
i40e: Fix DMA mappings leak
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 buffers were freed in i40e_configure_rx_ring and reallocated again with i40e_alloc_rx_bi, thus kfree on rx_bi caused leak of already mapped DMA. Fix this by reallocating ZC with rx_bi_zc struct when BPF program loads. Additionally reallocate back to rx_bi when BPF program unloads. If BPF program is loaded/unloaded and XSK pools are created, reallocate RX queues accordingly in XSP_SETUP_XSK_POOL handler.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于i40e中DMA映射泄漏，可能导致内存耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux be1222b585fdc410b8c1dbcc57dd03a00f04eff5 ~ ed5baf3d0a33caaca4cd4073ebb0854cc77a616d -
LinuxLinux 5.8 -

II. Public POCs for CVE-2022-50679

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III. Intelligence Information for CVE-2022-50679

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2023-53827Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2023-53846f2fs: fix to do sanity check on direct node in truncate_dnode()
CVE-2023-53845nilfs2: fix infinite loop in nilfs_mdt_get_block()
CVE-2023-53844drm/ttm: Don't leak a resource on swapout move error
CVE-2023-53843net: openvswitch: reject negative ifindex
CVE-2023-53842ASoC: codecs: wcd-mbhc-v2: fix resource leaks on component remove
CVE-2023-53841devlink: report devlink_port_type_warn source device
CVE-2023-53840usb: early: xhci-dbc: Fix a potential out-of-bound memory access
CVE-2023-53839dccp: fix data-race around dp->dccps_mss_cache
CVE-2023-53838f2fs: synchronize atomic write aborts
CVE-2023-53837drm/msm: fix NULL-deref on snapshot tear down
CVE-2023-53836bpf, sockmap: Fix skb refcnt race after locking changes
CVE-2023-53834iio: adc: ina2xx: avoid NULL pointer dereference on OF device match
CVE-2023-53833drm/i915: Fix NULL ptr deref by checking new_crtc_state
CVE-2023-53832md/raid10: fix null-ptr-deref in raid10_sync_request
CVE-2023-53831net: read sk->sk_family once in sk_mc_loop()
CVE-2023-53830platform/x86: think-lmi: Fix memory leak when showing current settings
CVE-2023-53829f2fs: flush inode if atomic file is aborted
CVE-2023-53828Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_add_adv_monitor()
CVE-2022-50674riscv: vdso: fix NULL deference in vdso_join_timens() when vfork

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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