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TI-2026-47942 Aliases CVE-2026-68162GHSA-f75f-9mxv-wjhq

sctp: avoid auth_enable sysctl UAF during netns teardown

Priority LOW 35CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00198 9th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.292, 5.10.266, 5.15.217 +6Red Hat: 2 advisoriesRed Hat: 12 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.4.290 to before 5.4.292; 5.10.234 to before 5.10.266; 5.15.177 to before 5.15.217; 6.1.125 to before 6.1.184; 6.6.72 to before 6.6.151; 6.12.10 to before 6.12.1015.4.292, 5.10.266, 5.15.217, 6.1.184, 6.6.151, 6.12.101Patch availableCNA
LinuxLinux6.13 and later5.4.292, 5.10.266, 5.15.217, 6.1.184, 6.6.151, 6.12.101, 6.18.42, 7.1.6, 7.2Patch availableCNA
  • Linux VendorLinux Affected 5.4.290 to before 5.4.292; 5.10.234 to before 5.10.266; 5.15.177 to before 5.15.217; 6.1.125 to before 6.1.184; 6.6.72 to before 6.6.151; 6.12.10 to before 6.12.101 Fixed in 5.4.292, 5.10.266, 5.15.217, 6.1.184, 6.6.151, 6.12.101 Patch available CNA
  • Linux VendorLinux Affected 6.13 and later 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 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.4.292, 5.10.266, 5.15.217, 6.1.184, 6.6.151, 6.12.101
  • Fix · CNA Linux (Linux) 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

Red Hat 2 advisories

  • RHSA-2026:95370 Released 2026-11-05 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.66.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.66.1.el9_8, kernel-64k-devel-5.14.0-687.66.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.66.1.el9_8, kernel-64k-5.14.0-687.66.1.el9_8, kernel-64k-core-5.14.0-687.66.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.66.1.el9_8, libperf-5.14.0-687.66.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.66.1.el9_8, kernel-rt-64k-5.14.0-687.66.1.el9_8, kernel-rt-64k-core-5.14.0-687.66.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.66.1.el9_8, kernel-rt-core-5.14.0-687.66.1.el9_8, kernel-rt-debug-5.14.0-687.66.1.el9_8 +9
  • RHSA-2026:85321 Released 2026-10-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.67.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.67.1.el10_2, kernel-64k-devel-6.12.0-211.67.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.67.1.el10_2, kernel-64k-6.12.0-211.67.1.el10_2, kernel-64k-core-6.12.0-211.67.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.67.1.el10_2, libperf-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.67.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.67.1.el10_2, kernel-rt-64k-6.12.0-211.67.1.el10_2, kernel-rt-64k-core-6.12.0-211.67.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.67.1.el10_2, kernel-rt-core-6.12.0-211.67.1.el10_2, kernel-rt-debug-6.12.0-211.67.1.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:85321
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:95370
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:95370
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:95370
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:95370
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:85321
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:95370
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-68162
  2. 2026-10-03 Alias added: GHSA-f75f-9mxv-wjhq
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-20 Weakness changed · CISA ADP
  5. 2026-10-20 Fix available: RHSA-2026:85321 · Red Hat
  6. 2026-10-20 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat
  7. 2026-10-29 Affected versions changed · Red Hat
  8. 2026-10-30 Affected versions changed · Red Hat
  9. 2026-11-05 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) +2 · Red Hat
  10. 2026-11-06 Fix available: RHSA-2026:95370 · Red Hat

References

Other 9

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences