Use-after-free in Linux kernel - CVE-2026-90201

Vulnerability identifier: #VU151275

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-2026-90201

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to trigger a use-after-free condition.

The vulnerability exists due to a race condition in __page_pool_release_netmem_dma() when page_pool_scrub() runs concurrently with page_pool_put_netmem(). A local user can trigger concurrent page pool destruction and network memory return operations to trigger a use-after-free condition.

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/24ef02f934eeb48830cff6b739abc3c62b1d107b
• https://git.kernel.org/stable/c/424a9fc4876cc7f28e9cb0aa8d92e920d726e350
• https://git.kernel.org/stable/c/9b65b0253ad5a66f73efee9a79a21a1e2b57cf59
• https://git.kernel.org/stable/c/bbfef303f980c1c078b8fa142e10a0e2fbcdd247

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