CVE WatchOct 19, 2026

CVE-2026-23239

In the Linux kernel, the following vulnerability has been resolved: espintcp: Fix race condition in espintcp_close() This issue was discov

CVSS

7.8

High

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Mar 10, 2026 · Last modified: Oct 19, 2026 · CWE-362

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-10-062026-11-02

Technical description

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

Official references

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