CVE-2026-68161sctp: close UDP tunnel sockets during netns teardown
- 9.8CriticalCVSS base score
- 0.68%Exploitation in 30 daysEPSS · top 47% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: close UDP tunnel sockets during netns teardown proc_sctp_do_udp_port() starts per-net SCTP UDP tunneling sockets when net.sctp.udp_port is set, and stops/restarts them when the sysctl value changes. The netns exit path does not stop these sockets, so a namespace can be torn down while its SCTP UDP tunnel sockets are still installed. Close the UDP tunnel sockets from sctp_ctrlsock_exit() after unregistering the per-net sysctl table. This prevents new sysctl writes from racing in while the sockets are being released, and closes the sockets before the control socket is destroyed.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.68% · top 47% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < c29affd44e6769e3073235d4b471d9b501fa8166
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < c6eb2d615210b80339548ab07c0230edaab9a6c7
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < 8ff78591d309c50a4fdab683b68dd8d512a270dd
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < 3bf0e349cbb4f975f35eb22753acc346b89c66a0
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < 37ff9794be48d0caa37687e04d09675f9c849121
- affected 046c052b475e7119b6a30e3483e2888fc606a2f8 – < ffb2bd7ade36ec4da32c46a6eddbf4515316d08c
- affected 5.11
- unaffected < 5.11
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/c29affd44e6769e3073235d4b471d9b501fa8166 (opens in a new tab)
- https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7 (opens in a new tab)
- https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd (opens in a new tab)
- https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0 (opens in a new tab)
- https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121 (opens in a new tab)
- https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c (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)
- EUVD EUVD-2026-55547 (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://cveledger.app/cve/CVE-2026-68161)Record last updated .