CVE-2026-68161
sctp: close UDP tunnel sockets during netns teardown
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.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the latest Linux kernel patch.
- Verify netns teardown closes SCTP UDP tunnel sockets.
- Ensure sysctl table changes do not race with socket release.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68161.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68161 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68161
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68161 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68161 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.6.151', '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-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sctp/protocol.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.6.151', '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'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '6.6.151', '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-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sctp/protocol.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/37ff9794be48d0caa37687e04d09675f9c849121 Added Reference https://git.kernel.org/stable/c/3bf0e349cbb4f975f35eb22753acc346b89c66a0 Added Reference https://git.kernel.org/stable/c/8ff78591d309c50a4fdab683b68dd8d512a270dd Added Reference https://git.kernel.org/stable/c/c6eb2d615210b80339548ab07c0230edaab9a6c7 Added Reference https://git.kernel.org/stable/c/ffb2bd7ade36ec4da32c46a6eddbf4515316d08c