Linux Kernel SCTP Subsystem Race Condition Information Disclosure Vulnerability

September 14th, 2026
ZDI-26-689 ZDI-CAN-30223

CVE ID

CVE-2026-46227

CVSS Score

6.4 AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:L

Affected Vendors

Linux

Affected Products

Kernel

Vulnerability Details

This vulnerability allows local attackers to disclose sensitive information on affected installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the processing of message buffer initializations. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.

Additional Details

Linux has issued an update to correct this vulnerability. More details can be found at:
https://github.com/torvalds/linux/commit/abb5f36771cc4c05899b34000829a787572a8817

Disclosure Timeline

  • 2026-06-10 - Vulnerability reported to vendor
  • 2026-09-14 - Coordinated public release of advisory
  • 2026-09-14 - Advisory Updated

Credit

Nico Yip (@_cyeaa_)

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