Use-after-free in Linux kernel - CVE-2026-90113

Vulnerability identifier: #VU151368

CSH Severity: Low

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

CVE-ID: CVE-2026-90113

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 a use-after-free in the netdevsim queue-to-NAPI mapping when resetting a receive queue and requesting queue information through Netlink. A local user can reset a queue through the queue_reset debugfs interface and request queue information through NETDEV_CMD_QUEUE_GET to access freed memory.

Linux kernel
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)

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

• https://git.kernel.org/stable/c/07e98a4d5e9c292eae97c9cc5ab0937384e48492
• https://git.kernel.org/stable/c/b8f32b0804b4bf0cba0ee0a093e3fd74f11d7166
• https://git.kernel.org/stable/c/db038ac4dca0fa626199e9c297eddd8362be0550

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