PT-2026-44288 · Linux · Linux Kernel

CVE-2026-46165 · Published 2026-05-28 · Updated 2026-07-28

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A self-deadlock occurs in the openvswitch vport during the release of tunnel ports. Vports are protected by RCU (Read-Copy-Update), a synchronization mechanism that allows multiple readers to access data while a writer modifies it. The issue arises because rtnl unlock() calls netdev run todo() and blocks until all references are gone; however, the current code prevents the call rcu() function from being reached, meaning the vport is never freed and the reference is never released, leading to a deadlock during device removal.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-46165

ECHO-5FA6-13CC-5359

OESA-2026-3157

OPENSUSE-SU-2026:10954-1

SUSE-SU-2026:3130-1

SUSE-SU-2026:3166-1

USN-8566-1

USN-8568-1

USN-8569-1

USN-8593-1

USN-8603-1

USN-8618-1

Affected Products

Linux Kernel

References · 2459

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46165.json · Exploit
• https://ubuntu.com/security/CVE-2026-53320 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63861 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53358 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-47327 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53293 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31600 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53038 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46279 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39932 · Security Note
• https://ubuntu.com/security/CVE-2026-46086 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46171 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46071 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46318 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31591 · Vendor Advisory