gh-143195: fix UAF in {bytearray,memoryview}.hex(sep) via re-entrant sep.__len__#143209
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picnixz merged 3 commits intopython:mainfrom Dec 27, 2025
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…entrant `sep.__len__`
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Mmh. The memoryview is not entirely fixed. Looks like there is still a UAF but this one doesn't crash with the default build (bytearray crashed without ASAN build but memoryview requires ASAN). I'll fix this as well (I'll need to configure my build with ASAN, which I previously didn't) |
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needs backport to 3.13
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Thanks @picnixz for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. |
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…entrant `sep.__len__` (pythonGH-143209) (cherry picked from commit 9976c2b) 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-143219 is a backport of this pull request to the 3.14 branch. |
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…via re-entrant `sep.__len__` (pythonGH-143209) (cherry picked from commit 9976c2b) Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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GH-143220 is a backport of this pull request to the 3.13 branch. |
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…entrant `sep.__len__` (python#143209)
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_Py_strhex_implvia re-entrantsep.__len__inbytearray.hex#143195