CVE-2026-68161

Service interruption via unreleased SCTP tunnel sockets

Published Aug 10, 2026 · Updated Aug 10, 2026

Resource leak in the Linux kernel allows local users to cause a service interrupt through SCTP network-namespace teardown. The netns exit path leaves per-namespace UDP tunnel sockets installed after proc_sctp_do_udp_port() creates them for a nonzero net.sctp.udp_port setting. Low-privileged local access and configured SCTP UDP tunneling are required; repeated teardown can exhaust host resources.

CVSS severity7.0
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel allows local users to cause a service interrupt through SCTP network-namespace teardown. The netns exit path leaves per-namespace UDP tunnel sockets installed after proc_sctp_do_udp_port() creates them for a nonzero net.sctp.udp_port setting. Low-privileged local access and configured SCTP UDP tunneling are required; repeated teardown can exhaust host resources.

The record

CVE
CVE-2026-68161
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <37ff9794be48d0caa37687e04d09675f9c849121
  2. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <3bf0e349cbb4f975f35eb22753acc346b89c66a0
  3. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <8ff78591d309c50a4fdab683b68dd8d512a270dd
  4. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <c6eb2d615210b80339548ab07c0230edaab9a6c7
  5. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <ffb2bd7ade36ec4da32c46a6eddbf4515316d08c
  6. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <37ff9794be48d0caa37687e04d09675f9c849121; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <3bf0e349cbb4f975f35eb22753acc346b89c66a0; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <8ff78591d309c50a4fdab683b68dd8d512a270dd; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <c6eb2d615210b80339548ab07c0230edaab9a6c7; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <ffb2bd7ade36ec4da32c46a6eddbf4515316d08c; version=5.11

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8CVE.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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