Review reviewCritical

CVE-2025-68341

Linux

In the Linux kernel, the following vulnerability has been resolved: veth: reduce XDP no_direct return section to fix race As explain in commit fa349e396e48 ("veth: Fix race with AF_XDP exposing old or uninitialized descriptors") for veth there is a chance after napi_complete_done() that another CPU can manage start another NAPI instance running veth_pool(). For NAPI this is correctly handled as the napi_schedule_prep() check will prevent multiple instances from getting scheduled, but for the remaining code in veth_pool() this can run concurrent with the newly started NAPI instance. The prob...

CVSS: 9.8
EPSS: 0.38%
CISA KEV: Not listed
Published: 2025.12.23

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.38%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 401cb7dae8130fd34eb84648e02ab4c506df7d5e < c1ceabcb347d1b0f7e70a7384ec7eff3847b7628, >= 401cb7dae8130fd34eb84648e02ab4c506df7d5e < d0bd018ad72a8a598ae709588934135017f8af52, >= 401cb7dae8130fd34eb84648e02ab4c506df7d5e < a14602fcae17a3f1cb8a8521bedf31728f9e7e39, >= 6.11
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: Not available