Release of invalid pointer or reference in Linux kernel - CVE-2026-98630

Vulnerability identifier: #VU156941

CSH Severity: Low

CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98630

CWE-ID: CWE-763

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to potentially cause a denial of service through an invalid pointer dereference and a resource leak.

The vulnerability exists due to an attempt to destroy a page pool using an invalid error pointer in the Linux kernel fbnic driver's fbnic_alloc_qt_page_pools() function when payload page pool allocation fails. A local user can potentially trigger this allocation failure to cause the cleanup path to pass the error pointer to page_pool_destroy(), which may dereference it and leave the header page pool allocated.

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 kernel - update to 7.0 rc3
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/4bab07f7b74e59bb26032fa5ff6969d63e1c52ef
• https://git.kernel.org/stable/c/8e0b235bd918d06f54ba8fddd2c3ddc36ca59c15
• https://git.kernel.org/stable/c/f4277b19edbc6abc9e1db7d6f6148608e8cb3c34

• Release of invalid pointer or reference in Linux kernel meta fbnic driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more