CVE-2025-22134
MediumCVSS 4.2Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
A vulnerability in Vim may lead to a heap-buffer overflow when switching to other buffers with visual mode still active. The issue arises from the improper ending of visual mode, which may result in attempts to access memory beyond the end of a line in a buffer.
Risk Assessment
The risk is medium since the user must have visual mode enabled when executing the :all command. This could lead to unexpected application behavior and potential security vulnerabilities.
Recommendation
It is recommended to update to Vim version 9.1.1003 or later to mitigate this vulnerability and ensure proper resetting of visual mode before opening other windows and buffers.
Original NVD description (English source)
When switching to other buffers using the :all command and visual mode still being active, this may cause a heap-buffer overflow, because Vim does not properly end visual mode and therefore may try to access beyond the end of a line in a buffer. In Patch 9.1.1003 Vim will correctly reset the visual mode before opening other windows and buffers and therefore fix this bug. In addition it does verify that it won't try to access a position if the position is greater than the corresponding buffer line. Impact is medium since the user must have switched on visual mode when executing the :all ex command. The Vim project would like to thank github user gandalf4a for reporting this issue. The issue has been fixed as of Vim patch v9.1.1003