CVE-2026-98585
kernel: eth: fbnic: Avoid rounding zero ring sizes
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel's fbnic network driver. A local user with administrative privileges could trigger a denial of service (DoS) and crash the system by configuring a network ring buffer size of zero. Because the driver fails to validate the input before executing a rounding calculation, processing a zero value causes an undefined operation.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-1284 · Improper Validation of Specified Quantity in Input