CVE-2022-50405
net/tunnel: wait until all sk_user_data reader finish before releasing the sock
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < e8316584b0a6c61c9c407631040c22712b26e38c
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 84e566d157cc22ad2da8bdd970495855fbf13d92
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < be34e79e0ae6adbf6e7e75ddaee9ad84795ab933
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 303000c793f705d07b551eb7c1c27001c5b33c8d
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 91f09a776ae335ca836ed864b8f2a9461882a280
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 9a6544343bba7da929d6d4a2dc44ec0f15970081
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < b38aa7465411795e9e744b8d94633910497fec2a
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 588d0b8462f5ffed3e677e65639825b2678117ab
- affected 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d – < 3cf7203ca620682165706f70a1b12b5194607dce
- affected 3.18
- unaffected < 3.18
- unaffected 4.9.337 – ≤ 4.9.*
- unaffected 4.14.303 – ≤ 4.14.*
- unaffected 4.19.270 – ≤ 4.19.*
- unaffected 5.4.229 – ≤ 5.4.*
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.86 – ≤ 5.15.*
- unaffected 6.0.16 – ≤ 6.0.*
- unaffected 6.1.2 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (9)
- https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c (opens in a new tab)
- https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92 (opens in a new tab)
- https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933 (opens in a new tab)
- https://git.kernel.org/stable/c/303000c793f705d07b551eb7c1c27001c5b33c8d (opens in a new tab)
- https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280 (opens in a new tab)
- https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081 (opens in a new tab)
- https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a (opens in a new tab)
- https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab (opens in a new tab)
- https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50405)Record last updated .