CVE-2024-53206: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.6% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler(). The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with __inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler(). Then, oreq should be passed to reqsk_put() instead of req; otherwise use-after-free of nreq could happen when reqsk is migrated but the retry attempt failed (e.g. due to timeout). Let's pass oreq to reqsk_put().

Affected products

• Linux Linux Kernel: from 5.15.170, before 5.15.174 (fixed in 5.15.174); from 6.1.115, before 6.1.120 (fixed in 6.1.120); from 6.6.59, before 6.6.64 (fixed in 6.6.64); from 6.11.6, before 6.11.11 (fixed in 6.11.11); from 6.12, before 6.12.2 (fixed in 6.12.2)

Published 2024-12-27. Last modified 2026-08-04.