CVE-2024-43890: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix overflow in get_free_elt() "tracing_map->next_elt" in get_free_elt() is at risk of overflowing. Once it overflows, new elements can still be inserted into the tracing_map even though the maximum number of elements (`max_elts`) has been reached. Continuing to insert elements after the overflow could result in the tracing_map containing "tracing_map->max_size" elements, leaving no empty entries. If any attempt is made to insert an element into a full tracing_map using `__tracing_map_insert()`, it will cause an infinite loop with preemption disabled, leading to a CPU hang problem. Fix this by preventing any further increments to "tracing_map->next_elt" once it reaches "tracing_map->max_elt".

Affected products

• Linux Linux Kernel: from 4.7, before 4.19.320 (fixed in 4.19.320); from 4.20, before 5.4.282 (fixed in 5.4.282); from 5.5, before 5.10.224 (fixed in 5.10.224); from 5.11, before 5.15.165 (fixed in 5.15.165); from 5.16, before 6.1.105 (fixed in 6.1.105); from 6.2, before 6.6.46 (fixed in 6.6.46); …

Published 2024-08-26. Last modified 2026-06-17.