double-free in dialog_changed() in Vim < v9.1.0648 ================================================== Date: 01.08.2024 Severity: Low CVE: <not-yet-assigned> CWE: Double Free (CWE-416)
When abandoning a buffer, Vim may ask the user what to do with the modified buffer. If the user wants the changed buffer to be saved, Vim may create a new Untitled file, if the buffer did not have a name yet. However, when setting the buffer name to Unnamed, Vim will falsely free a pointer twice, leading to a double-free and possibly later to a heap-use-after-free, which can lead to a crash. The Vim project would like to thank github user SuyueGuo for reporting this issue. The issue has been fixed as of Vim patch v9.1.0648 URLs: https://github.com/vim/vim/commit/b29f4abcd4b3382fa746e https://github.com/vim/vim/security/GHSA-46pw-v7qw-xc2f Thanks, Chris -- Denk immer daran, daß die Menge, die bei Deiner Krönung gejubelt hat, auch klatschen wird, wenn man Dich köpft. -- Terry Pratchett, "Ab die Post"