CVE-2011-2898: net/packet/af_packet.c in the Linux kernel before 2.6.39.3 does not properly restrict user-space access to...

Security readout for executives and security teams

This is an old Linux kernel information disclosure issue. A local user could run a crafted application to read potentially sensitive packet-related data tied to VLAN tag handling. It is mainly relevant to systems still running Linux kernels before 2.6.39.3 or vendor kernels that did not backport the fix. Exposure is most likely on legacy Linux systems, embedded appliances, or vendor-maintained kernels derived from pre-2.6.39.3 code. Modern supported distributions are unlikely to remain affected unless running very old or custom kernels. Treat this as a legacy exposure cleanup item, not an emergency for current supported systems. Raise priority if any internet-facing, shared, or untrusted-user systems still run affected kernels. Mitigation focus: Upgrade affected Linux kernels or apply the vendor backport containing the upstream fix.; Check vendor advisories for distribution-specific fixed kernel packages.; Prioritize shared, multi-user, container-hosting, and untrusted workload systems..

Prepared

Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.