How severe is CVE-2024-36891?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 5.5 out of 10.

What type of vulnerability is CVE-2024-36891?

This is classified as CWE-476, which is a common weakness in software security.

CVE-2024-36891 - MEDIUM Severity | CVSS 5.5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix mas_empty_area_rev() null pointer dereference Currently the code calls mas_start() followed by mas_data_end() if the maple state is MA_START, but mas_start() may return with the maple state node == NULL. This will lead to a null pointer dereference when checking information in the NULL node, which is done in mas_data_end(). Avoid setting the offset if there is no node by waiting until after the maple state is checked for an empty or single entry state. A user could trigger the events to cause a kernel oops by unmapping all vmas to produce an empty maple tree, then mapping a vma that would cause the scenario described above.

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