PT-2026-43865 · Linux+2 · Linux Kernel+2

Published 2026-05-27 · Updated 2026-06-16 · CVE-2026-45998

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A Use-After-Free (UAF) issue exists in the rxrpc component. If the skb unshare() function fails to unshare a packet due to an allocation failure within rxrpc input packet(), the skb pointer in the parent function rxrpc io thread() is set to NULL. This sequence leads to a system oops when trace rxrpc rx done() is called.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-45998

OPENSUSE-SU-2026:10954-1

USN-8370-1

USN-8371-1

USN-8373-1

USN-8374-1

USN-8393-1

USN-8440-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 702

• https://ubuntu.com/security/CVE-2026-46000 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23088 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71101 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68773 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68744 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68372 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23001 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68808 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68813 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71075 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46323 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23206 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23394 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23054 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23053 · Vendor Advisory