CVE-2026-90086

kernel: xsk: honor XDP_TX_METADATA in zero-copy path

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Severity

Low

Red Hat Product Security

5.4

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's xsk (AF_XDP) subsystem. The zero-copy path incorrectly reads transmit (TX) metadata even when the XDP_TX_METADATA option is not explicitly set. This can lead to the metadata union being overwritten with an unrequested timestamp, potentially causing data integrity issues or unexpected behavior within the kernel's network processing.

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 · 5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CWE-787 · Out-of-bounds Write