Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before 883e5d542bbdddbddeba60250cb482baf3ae2415; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before 6c9c7c1e63b198a8b979ad963eb21410f10ccb00; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before f3956791cf526540addd3295e4c1e0f0442486cc; affected 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa before 955a923d2809803980ff574270f81510112be9cf |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 6.1.94 through 6.1.*; unaffected 6.6.31 through 6.6.*; unaffected 6.8.10 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415
- https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00
- https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486cc
- https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cf
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.