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GeezerVison is showing github.com — [3.12] gh-126037: fix UAF in `xml.etree.ElementTree.Element.find*` when concurrent mutations happen (#127964) by picnixz · Pull Request #131932 · python/cpython

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@picnixz

@picnixz picnixz commented Mar 31, 2025 •
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We fix a use-after-free in the find, findtext and findall methods of xml.etree.ElementTree.Element objects that can be triggered when the tag to find implements an __eq__ method that mutates the element being queried.

(cherry picked from commit c57623c)

  • Issue: UAF: xml.etree.ElementTree.Element.find* when concurrent mutations happen #126037

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@picnixz
pythongh-126037: fix UAF in xml.etree.ElementTree.Element.find* whe…
0c9dd84
…n concurrent mutations happen (python#127964)

We fix a use-after-free in the `find`, `findtext` and `findall` methods of `xml.etree.ElementTree.Element`
objects that can be triggered when the tag to find implements an `__eq__` method that mutates the
element being queried.
@bedevere-app bedevere-app Bot mentioned this pull request Mar 31, 2025
gh-126037: fix UAF in xml.etree.ElementTree.Element.find* when concurrent mutations happen #127964
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@bedevere-app bedevere-app Bot added topic-XML awaiting core review labels Mar 31, 2025
@bedevere-app bedevere-app Bot mentioned this pull request Mar 31, 2025
UAF: xml.etree.ElementTree.Element.find* when concurrent mutations happen #126037
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@picnixz picnixz self-assigned this Mar 31, 2025
@picnixz
picnixz merged commit f1689b6 into python:3.12 Mar 31, 2025
@bedevere-app bedevere-app Bot removed the awaiting core review label Mar 31, 2025
@picnixz
picnixz deleted the bp-312/c57623c221d46daeaedfbf2b32d041fde0c882de/xml-evil-find-126037 branch March 31, 2025 12:47
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@picnixz
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