gh-142557: fix UAF in bytearray.__mod__ when object is mutated while formatting %-style arguments#143213
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picnixz merged 7 commits intopython:mainfrom Dec 27, 2025
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…nt's `__repr__`
picnixz
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needs backport to 3.13
picnixz
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Dec 27, 2025
Misc/NEWS.d/next/Core_and_Builtins/2025-12-27-12-25-06.gh-issue-142557.KWOc8b.rst
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picnixz
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Dec 27, 2025
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serhiy-storchaka
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LGTM. 👍
Don't forget to edit the commit message before merging.
picnixz
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bytearray.__mod__ via re-entrant argument's __repr__bytearray.__mod__ when object is mutated while formatting %-style arguments
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Thanks @picnixz for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. |
miss-islington
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Dec 27, 2025
…d while formatting `%`-style arguments (pythonGH-143213) (cherry picked from commit 61ee048) Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Sorry, @picnixz, I could not cleanly backport this to |
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GH-143227 is a backport of this pull request to the 3.14 branch. |
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… mutated while formatting `%`-style arguments (pythonGH-143213) (cherry picked from commit 61ee048) Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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GH-143229 is a backport of this pull request to the 3.13 branch. |
thunder-coding
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…d while formatting `%`-style arguments (python#143213)
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bytearray_mod(bytes formatting) via re-entrant__repr__method #142557