Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-90384

Vulnerability identifier: #VU151095

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90384

CWE-ID: CWE-772

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource release in the iomap iterator folio batch handling when processing iomap zero-range operations that encounter filesystem callback errors. A local user can cause an iomap zero-range operation to encounter an iomap_begin or iomap_end callback error to cause a denial of service.

The issue can occur when a populated folio batch is not released after a callback error.

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/31e3d833d522746a93d135e8b465d16f8ad33453
• https://git.kernel.org/stable/c/34470cc3a8e66751030d7b777dd18d9f2acb48e8

• Missing Release of Resource after Effective Lifetime in Linux kernel iomap
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more