SB20261022202 - NULL pointer dereference in Linux kernel meta fbnic driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98618)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to a null pointer dereference caused by insufficient NAPI vector allocation in the Linux kernel fbnic driver when setting up the maximum number of standalone channels. A local privileged user can trigger resource setup for this configuration to cause a kernel crash and denial of service.

The affected configuration uses 64 Tx queues and 64 Rx queues.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/16ff1023213cc39c1a7ce737205c2a1a53c3a716
• https://git.kernel.org/stable/c/1f4c73064a50f53d596c6f1d06d2d700f43c4b32
• https://git.kernel.org/stable/c/6c903188b67617070017305a325fa326f270a43d
• https://git.kernel.org/stable/c/9843e5fabd6ab296df9c025b1d0e5bf79a6b8a08