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

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 5.5 Difficulty: Easy EPSS 0.24% · P15 Updated May 13, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

Vendor	Product	Version Range	Status
Linux	Linux	`be1222b585fdc410b8c1dbcc57dd03a00f04eff5< ed5baf3d0a33caaca4cd4073ebb0854cc77a616d`	affected
		`be1222b585fdc410b8c1dbcc57dd03a00f04eff5< 94a171c982b8a8137a00721c1e62bc2713435bca`	affected
		`be1222b585fdc410b8c1dbcc57dd03a00f04eff5< 5f499596dfa3db9b3172645b6de9e1096a669c95`	affected
		`be1222b585fdc410b8c1dbcc57dd03a00f04eff5< aae425efdfd1b1d8452260a3cb49344ebf20b1f5`	affected
		`5.8`	affected
		`< 5.8`	unaffected
		`5.10.152≤ 5.10.*`	unaffected
		`5.15.76≤ 5.15.*`	unaffected
… +2 more rows

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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: CVE Program / CVE List V5

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: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

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

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	be1222b585fdc410b8c1dbcc57dd03a00f04eff5 ~ ed5baf3d0a33caaca4cd4073ebb0854cc77a616d	-
Linux	Linux	5.8	-

II. Public POCs for CVE-2022-50679

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2022-50679

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https://www.cve.org/CVERecord?id=CVE-2022-50679

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

CVE-2025-40343	9.8 CRITICAL	nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794	9.8 CRITICAL	cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2022-50666	9.8 CRITICAL	RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2023-53827	8.8 HIGH	Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2023-53785	8.8 HIGH	mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2023-53822	8.8 HIGH	wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2025-40336	8.8 HIGH	drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2025-40342	8.8 HIGH	nvme-fc: use lock accessing port_state and rport state
CVE-2025-40328	8.8 HIGH	smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851	8.4 HIGH	drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337	8.2 HIGH	net: stmmac: Correctly handle Rx checksum offload errors
CVE-2022-50656	8.1 HIGH	nfc: pn533: Clear nfc_target before being used
CVE-2023-53803	8.1 HIGH	scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2023-53804	7.8 HIGH	nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
CVE-2023-53819	7.8 HIGH	amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
CVE-2023-53816	7.8 HIGH	drm/amdkfd: fix potential kgd_mem UAFs
CVE-2023-53800	7.8 HIGH	ubi: Fix use-after-free when volume resizing failed
CVE-2023-53790	7.8 HIGH	bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53795	7.8 HIGH	iommufd: IOMMUFD_DESTROY should not increase the refcount
CVE-2023-53810	7.8 HIGH	blk-mq: release crypto keyslot before reporting I/O complete

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

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2022-50679

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Goal Reached Thanks to every supporter — we hit 100%!

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

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 10

I. Basic Information for CVE-2022-50679

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2022-50679

III. Intelligence Information for CVE-2022-50679

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

IV. Related Vulnerabilities

V. Comments for CVE-2022-50679

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