Use-after-free in Linux kernel - CVE-2026-92484

Vulnerability identifier: #VU151034

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-92484

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to access freed memory.

The vulnerability exists due to use-after-free in the CXL region find_pos_and_ways() function when reporting an error after releasing a switch decoder reference. A local user can cause an error that logs the decoder name after its reference is released to access freed memory.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/15da704b732332cc1e8f121f624e5e6c05124c5d
• https://git.kernel.org/stable/c/68edf359b0b45cad2654510c1ca257079b241aa5
• https://git.kernel.org/stable/c/8f7683ce37a53eeabd721941517341d2eef2cf3c
• https://git.kernel.org/stable/c/b38ca9ce8c7d9b8151bb9e4770404c5e39600a48
• https://git.kernel.org/stable/c/f54b96e8aadbfc7f2a1b26df349ef9b062c47d2e

• Use-after-free in Linux kernel cxl core driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more