SB20261022134 - Improper Validation of Specified Quantity in Input in Linux kernel google gve driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Specified Quantity in Input (CVE-ID: CVE-2026-98556)

CWE-ID: CWE-1284 - Improper Validation of Specified Quantity in Input

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause oversized packets to reach a network device, potentially disrupting packet transmission.

The vulnerability exists due to insufficient packet-size validation in the Linux kernel's layer 2 forwarding path when forwarding GSO packets that subsequently undergo software segmentation. A local user can supply packets with an oversized gso_size through a tap interface or packet socket to produce non-TSO packets exceeding the device's supported packet size, potentially disrupting packet transmission.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/296c83b5ccc808c080865eb20fd7a477b0355bb7
• https://git.kernel.org/stable/c/2dc3ae3942e151fef254b7bbb65c832192ad2069
• https://git.kernel.org/stable/c/c517e8755960c8c6335ebf7dae6c95c43e5fb085