CVE-2026-68162

High

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.

Package Linux Kernel
Published 2026-08-10
Last modified 2026-08-23
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 5.4.290, 5.10.234, 5.15.177, 6.1.125, 6.6.72, 6.12.10, 6.13 and later are affected. Fixed in 5.4.292, 5.10.266, 5.15.217, 6.1.184, 6.6.151, 6.12.101, 6.18.42, 7.1.6, 7.2 and their respective stable series.

Affected from
≥ 5.4.290 ≥ 5.10.234 ≥ 5.15.177 ≥ 6.1.125 ≥ 6.6.72 ≥ 6.12.10 ≥ 6.13
Fixed in
✓ 5.4.292 5.4.x ✓ 5.10.266 5.10.x ✓ 5.15.217 5.15.x ✓ 6.1.184 6.1.x ✓ 6.6.151 6.6.x ✓ 6.12.101 6.12.x ✓ 6.18.42 6.18.x ✓ 7.1.6 7.1.x ✓ 7.2

References

9 total
Showing 5 of 9 references View all on NVD

Frequently asked questions

  • What is CVE-2026-68162?

    CVE-2026-68162 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.4.290 onward and has been patched in 5.4.292, 5.10.266, 5.15.217 and others. CVE-2026-68162 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-68162?

    CVE-2026-68162 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2026-68162?

    Yes. CVE-2026-68162 has been patched. Fixed versions include 5.4.292, 5.10.266, 5.15.217 and others. If you are running Linux kernel 5.4.290 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-68162 actively exploited?

    No. CVE-2026-68162 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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