Improper resource shutdown or release in Linux kernel - CVE-2026-90318

Vulnerability identifier: #VU151169

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90318

CWE-ID: CWE-404

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to cause a resource leak.

The vulnerability exists due to improper resource release in fat_rebuild_parent() when rebuilding parent inodes through the nostale_ro NFS export path. A remote user can trigger parent inode reconstruction without releasing the buffer head to cause a resource leak.

Linux kernel
Debian Linux
Ubuntu
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (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 kernel - update to 7.0 rc3
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-azure-fde (Ubuntu package) - update to 5.15.0-1124.133
linux (Ubuntu package) - update to 7.0.0-42.42
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
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/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393
• https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755
• https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee
• https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1
• https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8
• https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a
• https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826
• https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3

• Improper resource shutdown or release in Linux kernel fat
• Debian update for linux
• Ubuntu update for linux-azure-fde
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more