In the Linux kernel, the following vulnerability has been resolved: xsk: validate launch-time metadata size Launch-time metadata extends beyond the… (CVE-2026-74708)
A vulnerability in the Linux kernel related to the xsk (AF_XDP) interface's launch-time metadata size validation has been resolved. The issue involved launch-time metadata extending beyond the first 16 bytes of the struct xsk_tx_metadata, potentially causing improper handling. The fix rejects requests when the registered metadata area does not contain the complete field and snapshots validated flags to avoid inconsistent processing if user space changes flags concurrently. This vulnerability has been addressed in the kernel source, with further commits planned to improve metadata flag handling.
AI Analysis
Technical Summary
The Linux kernel had a vulnerability in the xsk (AF_XDP) transmit path where launch-time metadata could extend beyond the expected 16 bytes of the struct xsk_tx_metadata. This could lead to improper processing of transmit requests if the metadata area was incomplete or inconsistent due to concurrent user space flag changes. The patch enforces validation by rejecting requests with incomplete metadata and snapshots the flags to ensure consistent processing. Additional fixes are planned to fully address metadata flag usage in related code paths.
Potential Impact
The vulnerability could cause inconsistent or improper handling of transmit requests in the AF_XDP socket interface due to invalid or incomplete metadata. This may affect kernel stability or data integrity in the transmit path. No known exploits in the wild have been reported. The impact is limited to the kernel's xsk transmit functionality.
Mitigation Recommendations
A fix has been implemented in the Linux kernel source to validate launch-time metadata size and snapshot flags for consistent processing. Users should update to the fixed kernel version once available. No other mitigation is indicated. Patch status is not explicitly confirmed in the provided data; check the vendor or kernel advisory for the exact fixed versions and update instructions.
In the Linux kernel, the following vulnerability has been resolved: xsk: validate launch-time metadata size Launch-time metadata extends beyond the… (CVE-2026-74708)
Description
A vulnerability in the Linux kernel related to the xsk (AF_XDP) interface's launch-time metadata size validation has been resolved. The issue involved launch-time metadata extending beyond the first 16 bytes of the struct xsk_tx_metadata, potentially causing improper handling. The fix rejects requests when the registered metadata area does not contain the complete field and snapshots validated flags to avoid inconsistent processing if user space changes flags concurrently. This vulnerability has been addressed in the kernel source, with further commits planned to improve metadata flag handling.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel had a vulnerability in the xsk (AF_XDP) transmit path where launch-time metadata could extend beyond the expected 16 bytes of the struct xsk_tx_metadata. This could lead to improper processing of transmit requests if the metadata area was incomplete or inconsistent due to concurrent user space flag changes. The patch enforces validation by rejecting requests with incomplete metadata and snapshots the flags to ensure consistent processing. Additional fixes are planned to fully address metadata flag usage in related code paths.
Potential Impact
The vulnerability could cause inconsistent or improper handling of transmit requests in the AF_XDP socket interface due to invalid or incomplete metadata. This may affect kernel stability or data integrity in the transmit path. No known exploits in the wild have been reported. The impact is limited to the kernel's xsk transmit functionality.
Mitigation Recommendations
A fix has been implemented in the Linux kernel source to validate launch-time metadata size and snapshot flags for consistent processing. Users should update to the fixed kernel version once available. No other mitigation is indicated. Patch status is not explicitly confirmed in the provided data; check the vendor or kernel advisory for the exact fixed versions and update instructions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-qvq6-8jqj-q3p2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74708"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a8a27f0acd9273b499bc742
Added to database: 08/22/2026, 22:51:28 UTC
Last enriched: 08/23/2026, 00:38:19 UTC
Last updated: 08/23/2026, 02:12:00 UTC
Views: 2
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