CVE-2011-1080: The do_replace function in net/bridge/netfilter/ebtables.c in the Linux kernel before 2.6.39 does not ensur...

Security readout for executives and security teams

CVE-2011-1080 is a Linux kernel information leak in ebtables. A local user with CAP_NET_ADMIN could cause kernel stack memory to appear in a modprobe command line. This is not a remote internet exploit in the cited sources, but it matters on old kernels and systems that grant network administration capability broadly. Exposure is most likely on legacy Linux systems, vendor appliances, or containers/roles running kernels before the fix or without a vendor backport, especially where untrusted users or workloads have CAP_NET_ADMIN. The source bundle does not provide a complete affected product matrix. Prioritize remediation on legacy Linux infrastructure and appliances where untrusted users or containers can administer networking. For normal modern patched hosts, urgency is lower. The main business risk is sensitive kernel memory exposure that could support further local compromise research. Mitigation focus: Apply vendor kernel updates that include the Linux ebtables fix or equivalent backport.; Use distro advisories, such as Red Hat RHSA-2011:0833, to confirm packaged remediation.; Restrict CAP_NET_ADMIN to trusted administrators and workloads only..

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.