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gh-142557: fix UAF inbytearray.__mod__ when object is mutated while formatting%-style arguments#143213

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picnixz merged 7 commits intopython:mainfrompicnixz:fix/bytearray/uaf-in-mod-142557
Dec 27, 2025

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@picnixzpicnixz commentedDec 27, 2025•
edited by bedevere-appbot
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LGTM. 👍

Don't forget to edit the commit message before merging.

@picnixzpicnixz changed the titlegh-142557: fix UAF inbytearray.__mod__ via re-entrant argument's__repr__gh-142557: fix UAF inbytearray.__mod__ when object is mutated while formatting%-style argumentsDec 27, 2025
@picnixzpicnixzenabled auto-merge (squash)December 27, 2025 14:37
@picnixzpicnixz merged commit61ee048 intopython:mainDec 27, 2025
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Thanks@picnixz for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

miss-islington pushed a commit to miss-islington/cpython that referenced this pull requestDec 27, 2025
…d while formatting `%`-style arguments (pythonGH-143213)(cherry picked from commit61ee048)Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Sorry,@picnixz, I could not cleanly backport this to3.13 due to a conflict.
Please backport usingcherry_picker on command line.

cherry_picker 61ee04834b096be00678c6819b4957f3f4413a5e 3.13

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GH-143227 is a backport of this pull request to the3.14 branch.

@bedevere-appbedevere-appbot removed the needs backport to 3.14bugs and security fixes labelDec 27, 2025
@picnixzpicnixz deleted the fix/bytearray/uaf-in-mod-142557 branchDecember 27, 2025 15:19
picnixz added a commit that referenced this pull requestDec 27, 2025
…ed while formatting `%`-style arguments (GH-143213) (#143227)gh-142557: fix UAF in `bytearray.__mod__` when object is mutated while formatting `%`-style arguments (GH-143213)(cherry picked from commit61ee048)Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
picnixz added a commit to picnixz/cpython that referenced this pull requestDec 27, 2025
… mutated while formatting `%`-style arguments (pythonGH-143213)(cherry picked from commit61ee048)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 the3.13 branch.

@bedevere-appbedevere-appbot removed the needs backport to 3.13bugs and security fixes labelDec 27, 2025
picnixz added a commit that referenced this pull requestDec 27, 2025
…ed while formatting `%`-style arguments (GH-143213) (#143229)(cherry picked from commit61ee048)
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