7.8
HIGH
CVSS 3.1
CVE-2026-68162
sctp: avoid auth_enable sysctl UAF during netns teardown
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from ctl->data, so an already opened sysctl file can still target a network namespace while that namespace is being torn down. SCTP previously registered its per-net sysctls from sctp_defaults_init(), while the control socket is created later from sctp_ctrlsock_init(). This exposed a window during initialization where auth_enable was writable before net->sctp.ctl_sock existed, and a teardown window where auth_enable stayed writable after inet_ctl_sock_destroy() had released the control socket. Move the per-net SCTP sysctl registration into sctp_ctrlsock_init() after sctp_ctl_sock_init() succeeds, and unregister the sysctl table before destroying the control socket in sctp_ctrlsock_exit(). If sysctl registration fails after the control socket was created, destroy the control socket in the same init path. Make sctp_sysctl_net_unregister() tolerate a missing header and clear the saved pointer so init-error and exit paths can safely share the unregister helper.
Details
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
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for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Adjust sysctl registration timing and unregister sysctl tables during teardown.
- Register per-net sysctls after control socket creation.
- Unregister sysctl table before control socket destruction.
- Handle sysctl registration failures.
- Tolerate missing headers during unregistration.
References
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2026-68162.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68162 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-2026-68162
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-2026-68162 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68162 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': '10c869a52f266e40f548cc3c565d14930a5edafc', 'lessThan': '19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4', 'versionType': 'git'}, {'status': 'affected', 'version': '7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6', 'lessThan': '66700c0719675e0e118ae83b2d7168dacd69dd3d', 'versionType': 'git'}, {'status': 'affected', 'version': 'c184bc621e3cef03ac9ba81a50dda2dae6a21d36', 'lessThan': '626bda8cfe43dff19a9833ff6ba055a817b5455c', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'be6aae9d1b91c603adb35872d37d40e83daf8758', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'a50e73488e0bbdd262b3be3c9a1d8dd078382381', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'f8d5e7846025f4ab15a461235f8ebae9094a361a', 'versionType': 'git'}, {'status': 'affected', 'version': 'dc583e7e5f8515ca489c0df28e4362a70eade382', 'versionType': 'git'}, {'status': 'affected', 'version': 'bd2a2939423566c654545fa3e96a656662a0af9e', 'versionType': 'git'}, {'status': 'affected', 'version': '1b67030d39f2b00f94ac1f0af11ba6657589e4d3', 'versionType': 'git'}, {'status': 'affected', 'version': '5.4.290', 'lessThan': '5.4.292', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.72', 'lessThan': '6.6.151', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.10', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.234', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.177', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.125', 'lessThan': '6.2', 'versionType': 'semver'}], 'programFiles': ['net/sctp/protocol.c', 'net/sctp/sysctl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.4.292', 'versionType': 'semver', 'lessThanOrEqual': '5.4.*'}, {'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', 'net/sctp/sysctl.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '10c869a52f266e40f548cc3c565d14930a5edafc', 'lessThan': '19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4', 'versionType': 'git'}, {'status': 'affected', 'version': '7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6', 'lessThan': '66700c0719675e0e118ae83b2d7168dacd69dd3d', 'versionType': 'git'}, {'status': 'affected', 'version': 'c184bc621e3cef03ac9ba81a50dda2dae6a21d36', 'lessThan': '626bda8cfe43dff19a9833ff6ba055a817b5455c', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'be6aae9d1b91c603adb35872d37d40e83daf8758', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'a50e73488e0bbdd262b3be3c9a1d8dd078382381', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'f8d5e7846025f4ab15a461235f8ebae9094a361a', 'versionType': 'git'}, {'status': 'affected', 'version': 'dc583e7e5f8515ca489c0df28e4362a70eade382', 'versionType': 'git'}, {'status': 'affected', 'version': 'bd2a2939423566c654545fa3e96a656662a0af9e', 'versionType': 'git'}, {'status': 'affected', 'version': '1b67030d39f2b00f94ac1f0af11ba6657589e4d3', 'versionType': 'git'}, {'status': 'affected', 'version': '5.4.290', 'lessThan': '5.4.292', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.72', 'lessThan': '6.6.151', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.10', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.234', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.177', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.125', 'lessThan': '6.2', 'versionType': 'semver'}], 'programFiles': ['net/sctp/protocol.c', 'net/sctp/sysctl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.4.292', 'versionType': 'semver', 'lessThanOrEqual': '5.4.*'}, {'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', 'net/sctp/sysctl.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:L/AC:L/PR:L/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': '10c869a52f266e40f548cc3c565d14930a5edafc', 'lessThan': '19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4', 'versionType': 'git'}, {'status': 'affected', 'version': '7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6', 'lessThan': '66700c0719675e0e118ae83b2d7168dacd69dd3d', 'versionType': 'git'}, {'status': 'affected', 'version': 'c184bc621e3cef03ac9ba81a50dda2dae6a21d36', 'lessThan': '626bda8cfe43dff19a9833ff6ba055a817b5455c', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'be6aae9d1b91c603adb35872d37d40e83daf8758', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'a50e73488e0bbdd262b3be3c9a1d8dd078382381', 'versionType': 'git'}, {'status': 'affected', 'version': '15649fd5415eda664ef35780c2013adeb5d9c695', 'lessThan': 'f8d5e7846025f4ab15a461235f8ebae9094a361a', 'versionType': 'git'}, {'status': 'affected', 'version': 'dc583e7e5f8515ca489c0df28e4362a70eade382', 'versionType': 'git'}, {'status': 'affected', 'version': 'bd2a2939423566c654545fa3e96a656662a0af9e', 'versionType': 'git'}, {'status': 'affected', 'version': '1b67030d39f2b00f94ac1f0af11ba6657589e4d3', 'versionType': 'git'}, {'status': 'affected', 'version': '5.4.290', 'lessThan': '5.4.292', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.72', 'lessThan': '6.6.151', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.10', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.234', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.177', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.125', 'lessThan': '6.2', 'versionType': 'semver'}], 'programFiles': ['net/sctp/protocol.c', 'net/sctp/sysctl.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.4.292', 'versionType': 'semver', 'lessThanOrEqual': '5.4.*'}, {'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', 'net/sctp/sysctl.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from ctl->data, so an already opened sysctl file can still target a network namespace while that namespace is being torn down. SCTP previously registered its per-net sysctls from sctp_defaults_init(), while the control socket is created later from sctp_ctrlsock_init(). This exposed a window during initialization where auth_enable was writable before net->sctp.ctl_sock existed, and a teardown window where auth_enable stayed writable after inet_ctl_sock_destroy() had released the control socket. Move the per-net SCTP sysctl registration into sctp_ctrlsock_init() after sctp_ctl_sock_init() succeeds, and unregister the sysctl table before destroying the control socket in sctp_ctrlsock_exit(). If sysctl registration fails after the control socket was created, destroy the control socket in the same init path. Make sctp_sysctl_net_unregister() tolerate a missing header and clear the saved pointer so init-error and exit paths can safely share the unregister helper. Added Reference https://git.kernel.org/stable/c/19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4 Added Reference https://git.kernel.org/stable/c/626bda8cfe43dff19a9833ff6ba055a817b5455c Added Reference https://git.kernel.org/stable/c/66700c0719675e0e118ae83b2d7168dacd69dd3d Added Reference https://git.kernel.org/stable/c/a50e73488e0bbdd262b3be3c9a1d8dd078382381 Added Reference https://git.kernel.org/stable/c/be6aae9d1b91c603adb35872d37d40e83daf8758 Added Reference https://git.kernel.org/stable/c/f8d5e7846025f4ab15a461235f8ebae9094a361a
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.