sctp: close UDP tunnel sockets during netns teardown
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.
CVE-2026-68161
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68161
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "c29affd44e6769e3073235d4b471d9b501fa8166",
"versionType": "git"
},
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "c6eb2d615210b80339548ab07c0230edaab9a6c7",
"versionType": "git"
},
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "8ff78591d309c50a4fdab683b68dd8d512a270dd",
"versionType": "git"
},
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "3bf0e349cbb4f975f35eb22753acc346b89c66a0",
"versionType": "git"
},
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "37ff9794be48d0caa37687e04d09675f9c849121",
"versionType": "git"
},
{
"status": "affected",
"version": "046c052b475e7119b6a30e3483e2888fc606a2f8",
"lessThan": "ffb2bd7ade36ec4da32c46a6eddbf4515316d08c",
"versionType": "git"
}
],
"programFiles": [
"net/sctp/protocol.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/protocol.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68161
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #41146 · Revision 1
- Added to Heist Feed
- Publisher date