Issues

_sre: out-of-bounds read in the SRE code validator for IN opcode with skip < 2

python/cpython#160814 · opened

on Oct 28, 2026

1

io.TextIOWrapper.tell() can read past its snapshot buffer after seek() past a carriage return

python/cpython#160811 · opened

on Oct 28, 2026

symtable: repr() of a Symbol raises TypeError under -X lazy_imports=all

python/cpython#160810 · opened

on Oct 28, 2026

2

Pure-Python `timedelta` loses precision with large float arguments

python/cpython#160806 · opened

on Oct 28, 2026

compile: double free of pc->fail_pop in codegen_pattern_or on allocation failure with nested or-pattern

python/cpython#160789 · opened

on Oct 27, 2026

codeobject: == on code objects takes exponential time in scope nesting depth (30 nested classes still running after 120 s)

python/cpython#160788 · opened

on Oct 27, 2026

`subprocess.run()` can warn that a child is still running after killing it on Ctrl-C

python/cpython#160787 · opened

on Oct 27, 2026

Backport venv activation scripts escaping improvements from virtualenv

python/cpython#160782 · opened

on Oct 27, 2026

BytesIO and StringIO issues with large sizes

python/cpython#160781 · opened

on Oct 27, 2026

tarfile: extractfile(member).read() of a sparse member is slow due to repeated bytes concatenation

python/cpython#160774 · opened

on Oct 27, 2026

1

Use-after-free in `OSError.str` when a formatting callback clears `filename`

python/cpython#160773 · opened

on Oct 27, 2026

Annotations: Nested generics containing forward references can evade evaluation in `ForwardRef.evaluate`

python/cpython#160766 · opened

on Oct 27, 2026

TypeError when pickling directly instantiated urllib.parse result objects

python/cpython#160761 · opened

on Oct 27, 2026

asyncio: run newly scheduled callbacks eagerly before polling for I/O

python/cpython#160760 · opened

on Oct 27, 2026

1

documentation of `tp_alloc` and `tp_free` inheritance for heap types is incorrect

python/cpython#160749 · opened

on Oct 27, 2026

ssl: test_distrusted_spki fails on AWS-LC builds

python/cpython#160736 · opened

on Oct 26, 2026

1

Tachyon: GeckoCollector closes open markers too early when replay batches arrive out of order

python/cpython#160735 · opened

on Oct 26, 2026

venv: --prompt / env-dir value is not escaped for the shell's prompt-display pass in generated activate (bash/zsh)

python/cpython#160732 · opened

on Oct 26, 2026

5

Speed up `print()` by looking up `file.write` once per call

python/cpython#160725 · opened

on Oct 26, 2026

Add `list.discard()` and `deque.discard()`

python/cpython#160724 · opened

on Oct 26, 2026

15

New `_Py_STDC_VERSION` macro not available in pyport.h

python/cpython#160719 · opened

on Oct 26, 2026

tarfile filter bypass: euc_kr make-up sequences let `realpath()` and the kernel disagree, writing files outside the destination

python/cpython#160717 · opened

on Oct 26, 2026

ctypes: out-of-bounds read/write in bool() and argument passing after resize()

python/cpython#160708 · opened

on Oct 26, 2026

Build fails with glibc 2.13 after `static_assert` fallback regression

python/cpython#160704 · opened

on Oct 26, 2026

`subprocess.run(timeout=...)` swallows a signal handler's `InterruptedError` on macOS in Python 3.15

python/cpython#160700 · opened

on Oct 26, 2026

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Issues

_sre: out-of-bounds read in the SRE code validator for IN opcode with skip < 2

io.TextIOWrapper.tell() can read past its snapshot buffer after seek() past a carriage return

symtable: repr() of a Symbol raises TypeError under -X lazy_imports=all

Pure-Python `timedelta` loses precision with large float arguments

compile: double free of pc->fail_pop in codegen_pattern_or on allocation failure with nested or-pattern

codeobject: == on code objects takes exponential time in scope nesting depth (30 nested classes still running after 120 s)

`subprocess.run()` can warn that a child is still running after killing it on Ctrl-C

Backport venv activation scripts escaping improvements from virtualenv

BytesIO and StringIO issues with large sizes

tarfile: extractfile(member).read() of a sparse member is slow due to repeated bytes concatenation

Use-after-free in `OSError.str` when a formatting callback clears `filename`

Annotations: Nested generics containing forward references can evade evaluation in `ForwardRef.evaluate`

TypeError when pickling directly instantiated urllib.parse result objects

asyncio: run newly scheduled callbacks eagerly before polling for I/O

documentation of `tp_alloc` and `tp_free` inheritance for heap types is incorrect

ssl: test_distrusted_spki fails on AWS-LC builds

Tachyon: GeckoCollector closes open markers too early when replay batches arrive out of order

venv: --prompt / env-dir value is not escaped for the shell's prompt-display pass in generated activate (bash/zsh)

Speed up `print()` by looking up `file.write` once per call

Add `list.discard()` and `deque.discard()`

New `_Py_STDC_VERSION` macro not available in pyport.h

tarfile filter bypass: euc_kr make-up sequences let `realpath()` and the kernel disagree, writing files outside the destination

ctypes: out-of-bounds read/write in bool() and argument passing after resize()

Build fails with glibc 2.13 after `static_assert` fallback regression

`subprocess.run(timeout=...)` swallows a signal handler's `InterruptedError` on macOS in Python 3.15