CVE-2024-43890

medium

Description

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".

References

https://git.kernel.org/stable/c/eb223bf01e688dfe37e813c8988ee11c8c9f8d0a

https://git.kernel.org/stable/c/d3e4dbc2858fe85d1dbd2e72a9fc5dea988b5c18

https://git.kernel.org/stable/c/cd10d186a5409a1fe6e976df82858e9773a698da

https://git.kernel.org/stable/c/bcf86c01ca4676316557dd482c8416ece8c2e143

https://git.kernel.org/stable/c/a172c7b22bc2feaf489cfc6d6865f7237134fdf8

https://git.kernel.org/stable/c/788ea62499b3c18541fd6d621964d8fafbc4aec5

https://git.kernel.org/stable/c/302ceb625d7b990db205a15e371f9a71238de91c

https://git.kernel.org/stable/c/236bb4690773ab6869b40bedc7bc8d889e36f9d6

Details

Source: Mitre, NVD

Published: 2024-08-26

Updated: 2024-09-05

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium