CVE-2022-50405— net/tunnel: wait until all sk_user_data reader finish before releasing the sock
Possible ATT&CK Techniques 1AI
T1211 · Exploitation for StealthAffected Version Matrix 20
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< e8316584b0a6c61c9c407631040c22712b26e38c | affected |
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< 84e566d157cc22ad2da8bdd970495855fbf13d92 | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< be34e79e0ae6adbf6e7e75ddaee9ad84795ab933 | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< 303000c793f705d07b551eb7c1c27001c5b33c8d | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< 91f09a776ae335ca836ed864b8f2a9461882a280 | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< 9a6544343bba7da929d6d4a2dc44ec0f15970081 | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< b38aa7465411795e9e744b8d94633910497fec2a | affected | ||
6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d< 588d0b8462f5ffed3e677e65639825b2678117ab | affected | ||
| … +12 more rows | |||
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I. Basic Information for CVE-2022-50405
Vulnerability Information
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Vulnerability Title
net/tunnel: wait until all sk_user_data reader finish before releasing the sock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/tunnel: wait until all sk_user_data reader finish before releasing the sock There is a race condition in vxlan that when deleting a vxlan device during receiving packets, there is a possibility that the sock is released after getting vxlan_sock vs from sk_user_data. Then in later vxlan_ecn_decapsulate(), vxlan_get_sk_family() we will got NULL pointer dereference. e.g. #0 [ffffa25ec6978a38] machine_kexec at ffffffff8c669757 #1 [ffffa25ec6978a90] __crash_kexec at ffffffff8c7c0a4d #2 [ffffa25ec6978b58] crash_kexec at ffffffff8c7c1c48 #3 [ffffa25ec6978b60] oops_end at ffffffff8c627f2b #4 [ffffa25ec6978b80] page_fault_oops at ffffffff8c678fcb #5 [ffffa25ec6978bd8] exc_page_fault at ffffffff8d109542 #6 [ffffa25ec6978c00] asm_exc_page_fault at ffffffff8d200b62 [exception RIP: vxlan_ecn_decapsulate+0x3b] RIP: ffffffffc1014e7b RSP: ffffa25ec6978cb0 RFLAGS: 00010246 RAX: 0000000000000008 RBX: ffff8aa000888000 RCX: 0000000000000000 RDX: 000000000000000e RSI: ffff8a9fc7ab803e RDI: ffff8a9fd1168700 RBP: ffff8a9fc7ab803e R8: 0000000000700000 R9: 00000000000010ae R10: ffff8a9fcb748980 R11: 0000000000000000 R12: ffff8a9fd1168700 R13: ffff8aa000888000 R14: 00000000002a0000 R15: 00000000000010ae ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffffa25ec6978ce8] vxlan_rcv at ffffffffc10189cd [vxlan] #8 [ffffa25ec6978d90] udp_queue_rcv_one_skb at ffffffff8cfb6507 #9 [ffffa25ec6978dc0] udp_unicast_rcv_skb at ffffffff8cfb6e45 #10 [ffffa25ec6978dc8] __udp4_lib_rcv at ffffffff8cfb8807 #11 [ffffa25ec6978e20] ip_protocol_deliver_rcu at ffffffff8cf76951 #12 [ffffa25ec6978e48] ip_local_deliver at ffffffff8cf76bde #13 [ffffa25ec6978ea0] __netif_receive_skb_one_core at ffffffff8cecde9b #14 [ffffa25ec6978ec8] process_backlog at ffffffff8cece139 #15 [ffffa25ec6978f00] __napi_poll at ffffffff8ceced1a #16 [ffffa25ec6978f28] net_rx_action at ffffffff8cecf1f3 #17 [ffffa25ec6978fa0] __softirqentry_text_start at ffffffff8d4000ca #18 [ffffa25ec6978ff0] do_softirq at ffffffff8c6fbdc3 Reproducer: https://github.com/Mellanox/ovs-tests/blob/master/test-ovs-vxlan-remove-tunnel-during-traffic.sh Fix this by waiting for all sk_user_data reader to finish before releasing the sock.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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vxlan设备删除时未等待所有sk_user_data读取完成，可能导致空指针取消引用。
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
II. Public POCs for CVE-2022-50405
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|---|
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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total
| CVE-2022-50410 | 9.8 CRITICAL | NFSD: Protect against send buffer overflow in NFSv2 READ |
| CVE-2022-50401 | 9.8 CRITICAL | nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure |
| CVE-2023-53382 | 9.8 CRITICAL | net/smc: Reset connection when trying to use SMCRv2 fails. |
| CVE-2022-50419 | 8.8 HIGH | Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times |
| CVE-2022-50413 | 8.8 HIGH | wifi: mac80211: fix use-after-free |
| CVE-2023-53431 | 8.8 HIGH | scsi: ses: Handle enclosure with just a primary component gracefully |
| CVE-2023-53432 | 8.8 HIGH | firewire: net: fix use after free in fwnet_finish_incoming_packet() |
| CVE-2023-53374 | 8.8 HIGH | Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early |
| CVE-2022-50386 | 8.8 HIGH | Bluetooth: L2CAP: Fix user-after-free |
| CVE-2023-53372 | 8.2 HIGH | sctp: fix a potential overflow in sctp_ifwdtsn_skip |
| CVE-2022-50399 | 7.8 HIGH | media: atomisp: prevent integer overflow in sh_css_set_black_frame() |
| CVE-2023-53398 | 7.8 HIGH | mlx5: fix possible ptp queue fifo use-after-free |
| CVE-2023-53394 | 7.8 HIGH | net/mlx5e: xsk: Fix crash on regular rq reactivation |
| CVE-2022-50417 | 7.8 HIGH | drm/panfrost: Fix GEM handle creation ref-counting |
| CVE-2023-53429 | 7.8 HIGH | btrfs: don't check PageError in __extent_writepage |
| CVE-2023-53373 | 7.8 HIGH | crypto: seqiv - Handle EBUSY correctly |
| CVE-2023-53387 | 7.8 HIGH | scsi: ufs: core: Fix device management cmd timeout flow |
| CVE-2023-53378 | 7.8 HIGH | drm/i915/dpt: Treat the DPT BO as a framebuffer |
| CVE-2023-53386 | 7.8 HIGH | Bluetooth: Fix potential use-after-free when clear keys |
| CVE-2023-53426 | 7.8 HIGH | xsk: Fix xsk_diag use-after-free error during socket cleanup |
Showing top 20 of 121 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74733
gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock - CVE-2026-74732
drm/amd/display: Check for tg ops in dce110_set_avmute - CVE-2026-74731
sched_ext: Skip sub-disable teardown for never-linked sub-sc - CVE-2026-74730
NFS: Pin the 'struct nfs_server' during a FREE_STATEID call - CVE-2026-74729
soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_
Same vendor: Linux
- CVE-2026-74733
gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock - CVE-2026-74732
drm/amd/display: Check for tg ops in dce110_set_avmute - CVE-2026-74731
sched_ext: Skip sub-disable teardown for never-linked sub-sc - CVE-2026-74730
NFS: Pin the 'struct nfs_server' during a FREE_STATEID call - CVE-2026-74729
soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_
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