18-Year-Old Linux SCTP Flaw Could Let Local Users Gain Root and Escape Containers
Fri Aug 07 2026
Linux
Patch Management
Vulnerability
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A use-after-free bug in Linux's SCTP networking code can be turned into full root on a host, and Tencent researchers say they used it to escape a container and reach the machine underneath.
The flaw has existed since 2008. The fix already shipped: stable kernels 7.1.6, 6.18.42, 6.12.101 and 6.6.148, released August 3, close it. Anyone running an older kernel with SCTP reachable should update.