In the Linux kernel, the following vulnerability has been resolved: espintcp: Fix race condition in espintcpclose() This issue was discovered during a code audit. After cancelworksync() is called from espintcpclose(), espintcptxwork() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the espintcptxwork() worker may dereference a freed espintcp ctx or sk. The following is a simple race scenario: cpu0 cpu1 espintcpclose() cancelworksync(&ctx->work); espintcpwritespace() schedulework(&ctx->work); To prevent this race condition, cancelworksync() is replaced with disableworksync().