Source: vim Version: 2:9.2.0524-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for vim. CVE-2026-52859[0]: | Vim is an open source, command line text editor. Prior to version | 9.2.0565, the update_snapshot() function in src/terminal.c copies | the visible terminal screen into the scrollback buffer when a | snapshot is taken. For each screen cell it walks the cell's chars[] | array with no upper bound, stopping only when it encounters a NUL | terminator. When a cell legitimately fills all | VTERM_MAX_CHARS_PER_CELL (6) slots — a base character plus five | combining marks — the bundled libvterm returns the array without a | terminating NUL, so the loop reads past the fixed six-element array | and appends the out-of-bounds values to a buffer reserved for only | six characters. A program whose output is rendered inside a | :terminal window can trigger this with a short byte sequence and no | Vim scripting, leading to a crash. This issue has been patched in | version 9.2.0565. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-52859 https://www.cve.org/CVERecord?id=CVE-2026-52859 [1] https://github.com/vim/vim/security/advisories/GHSA-47gw-8gc3-mgcm [2] https://github.com/vim/vim/commit/63680c6d3d52477817b49cd1a66e7aabe8a7aa19 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
