[3.13] gh-151695: Fix use-after-free of the curses screen encoding (GH-151696) (GH-151706)#151723
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serhiy-storchaka merged 1 commit intoJun 19, 2026
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…ing (pythonGH-151696) (pythonGH-151706) The module-global curses_screen_encoding stored a borrowed pointer to the encoding owned by the window returned by the first initscr() call. That window can be deallocated while unctrl() and ungetch(), which have no window of their own, still use the pointer to encode non-ASCII characters. Keep a private copy of the encoding instead. (cherry picked from commit 551f8e1) (cherry picked from commit 7b55e9a) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This was referenced Jun 19, 2026
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The module-global curses_screen_encoding stored a borrowed pointer to the encoding owned by the window returned by the first initscr() call. That window can be deallocated while unctrl() and ungetch(), which have no window of their own, still use the pointer to encode non-ASCII characters.
Keep a private copy of the encoding instead.
(cherry picked from commit 551f8e1) (cherry picked from commit 7b55e9a)