SB20261022215 - Release of invalid pointer or reference in Linux kernel meta fbnic driver

Description

This security bulletin contains information about 1 vulnerability.

1) Release of invalid pointer or reference (CVE-ID: CVE-2026-98630)

CWE-ID: CWE-763 - Release of invalid pointer or reference

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4bab07f7b74e59bb26032fa5ff6969d63e1c52ef
• https://git.kernel.org/stable/c/8e0b235bd918d06f54ba8fddd2c3ddc36ca59c15
• https://git.kernel.org/stable/c/f4277b19edbc6abc9e1db7d6f6148608e8cb3c34