CVE-2026-90063

kernel: virtio-net: Ensure that TCP packets don't overflow gso_segs

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 13, 2026

Description

A flaw was found in virtio-net, a network virtualization driver in the Linux kernel. A local user could exploit this vulnerability by crafting a specially designed TCP packet with a small gso_size value. This action could lead to an integer overflow in the gso_segs field during packet processing, potentially causing a denial of service (DoS) on the system.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-190 · Integer Overflow or Wraparound