kitty: Kitty is a cross-platform GPU based terminal
CVE-2026-54055 is fixed in 3 products on 1 platform, first by kitty 0.32.2-1ubuntu0.4+esm2, released June 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| kitty · Debian 13.5 (trixie) | 0.41.1-2+deb13u2 | DEBIAN-CVE-2026-54055 | Jun 24, 2026 |
| kitty · Debian 14 | 0.47.3-1 | DEBIAN-CVE-2026-54055 | Jun 24, 2026 |
| kitty · Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | kitty 0.32.2-1ubuntu0.4+esm2 | Jun 12, 2026 |
| kitty · Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | kitty 0.45.0-1ubuntu0.1~esm2 | Jun 12, 2026 |
| kitty-shell-integration · Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | kitty-shell-integration 0.32.2-1ubuntu0.4+esm2 | Jun 12, 2026 |
| kitty-shell-integration · Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | kitty-shell-integration 0.45.0-1ubuntu0.1~esm2 | Jun 12, 2026 |
| kitty-terminfo · Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | kitty-terminfo 0.32.2-1ubuntu0.4+esm2 | Jun 12, 2026 |
| kitty-terminfo · Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | kitty-terminfo 0.45.0-1ubuntu0.1~esm2 | Jun 12, 2026 |
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