{"id":"AZL-89772","summary":"CVE-2026-52859 affecting package vim for versions less than 9.2.0620-1","details":"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.","modified":"2026-08-28T17:47:38.351623156Z","published":"2026-06-11T19:16:47Z","upstream":["CVE-2026-52859"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52859"}],"affected":[{"package":{"name":"vim","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/vim"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.2.0620-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-89772.json"}}],"schema_version":"1.9.0"}