GHSA-9G3F-GJ9Q-HQJJ
Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-10-03 12:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-68161"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-10T13:20:02Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: close UDP tunnel sockets during netns teardown\n\nproc_sctp_do_udp_port() starts per-net SCTP UDP tunneling sockets when\nnet.sctp.udp_port is set, and stops/restarts them when the sysctl value\nchanges. The netns exit path does not stop these sockets, so a namespace\ncan be torn down while its SCTP UDP tunnel sockets are still installed.\n\nClose the UDP tunnel sockets from sctp_ctrlsock_exit() after unregistering\nthe per-net sysctl table. This prevents new sysctl writes from racing in\nwhile the sockets are being released, and closes the sockets before the\ncontrol socket is destroyed.",
"id": "GHSA-9g3f-gj9q-hqjj",
"modified": "2026-10-03T12:31:02Z",
"published": "2026-08-10T15:33:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68161"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c29affd44e6769e3073235d4b471d9b501fa8166"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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