CVE-2026-72383
In the Linux kernel, the following vulnerability has been resolved: sctp: fix addr_wq_timer race in sctp_free_addr_wq() sctp_free_addr_wq() previously removed addr_wq_timer using timer_delete() while holding addr_wq_lock. However, timer_delete() does not guarantee that a currently running timer handler has completed. This allows a race with sctp_addr_wq_timeout_handler(), where the handler may still run after addr_waitq has been freed, acquire addr_wq_lock, and access freed memory, leading to a use-after-free. Fix this by calling timer_shutdown_sync() before taking addr_wq_lock. This guarantees that any in-flight timer handler has finished and prevents the timer from being re-armed during teardown, making subsequent cleanup safe.
Affected versions
Linux kernel versions
3.7
and later are affected. Fixed in
6.18.40,
7.1.5,
7.2-rc2
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-72383?
CVE-2026-72383 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.7 onward and has been patched in 6.18.40, 7.1.5 and 7.2-rc2. CVE-2026-72383 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72383?
Yes. CVE-2026-72383 has been patched. Fixed versions include 6.18.40, 7.1.5 and 7.2-rc2. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72383 actively exploited?
No. CVE-2026-72383 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.