What’s Vulnerable › Vulnerabilities

CVE-2026-90142: virtio_net: Fix resize of the RX ring

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix resize of the RX ring When a AF_XDP socket is attached, the virtnet_rx_resize should resize the rq->xsk_buffs XSK buffer array. Otherwise, when the size grows, the virtnet_rx_resume() causes a write past the end of the array. This is easily reproducable with ethtool -G ens3 rx 32 ./xdpsock -i eth0 -q 0 -r -z & ethtool -G eth0 rx 256

Affected products

• Linux kernel: 6.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5235abdb760bbd7a6fcecf1890b5160b7a75a9ce
• https://git.kernel.org/stable/c/5c941b5d989a15cdaa987a2c602fb168461c6186
• https://git.kernel.org/stable/c/8344c9233c8f77017174d9e280c5a26034d068b6
• https://git.kernel.org/stable/c/d09c98a6da215bce2173a292e4b95c8de6ea5d51

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