What’s Vulnerable › Vulnerabilities

CVE-2026-74710: xsk: require at least 16 bytes of TX metadata

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-22 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: xsk: require at least 16 bytes of TX metadata AF_XDP accepts a TX metadata length as small as eight bytes, but every supported request needs the flags plus at least one eight-byte request field. Such short metadata also lets the kernel read beyond the registered area. Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve compatibility with applications that do not use launch-time metadata.

Affected products

• Linux kernel: 6.8 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1bb30b181d9f0484e141f8411e15ed906d5c6780
• https://git.kernel.org/stable/c/21b8536aee819792f1b4b38b9aacf2a073025d49
• https://git.kernel.org/stable/c/642c6e73fce17fdca93a5793c4d22359fda866d7
• https://git.kernel.org/stable/c/cfb9d2976b277e554e28c165e3eff4b4a8ea10bd

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