CVE-2024-36891 (GCVE-0-2024-36891)
Vulnerability from cvelistv5
Published
2024-05-30 15:28
Modified
2025-05-04 09:11
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa
Version: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa
Version: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa
Version: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa
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