CVE-2024-43374

A heap use-after-free vulnerability was found in Vim's alist_add() function. Adding a new file to the argument list triggers Buf* autocommands. In an autocommand, if the buffer that was just opened is closed, including the window where it is shown, it causes the window structure to be freed, containing a reference to the argument list that is being modified. Once the autocommands are completed, references to the window and argument list are no longer valid, causing a use-after-free issue. To trigger this issue, a local attacker or user must add unusual autocommands that wipe a buffer during creation, either manually or by sourcing a malicious plugin, which will cause Vim to crash.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.