CVE-2026-23239

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().

CVSS Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.10%• Percentile: 1%

Techniques & Countermeasures

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

• linux•linux

  ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < f7ad8b1d0e421c524604d5076b73232093490d5c | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 664e9df53226b4505a0894817ecad2c610ab11d8 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 022ff7f347588de6e17879a1da6019647b21321b | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < e1512c1db9e8794d8d130addd2615ec27231d994 | 5.6

• linux•linux kernel

  ≥ 5.6, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6 | 7.0:rc1

References (4)

• https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c
• https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8
• https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b
• https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994