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CVE-2026-9669

bz2.BZ2Decompressor reuse after error can cause a stack buffer overflow PUBLISHED

Description (CNA)

bz2.BZ2Decompressor objects could be reused after a decompression error. If an application caught the resulting OSError and retried with the same decompressor, crafted input could cause the decompressor to resume from an invalid internal state and perform out-of-bounds writes to a stack buffer. This could crash the process when processing untrusted data.

Affected (CNA)

Vendor / productVersions
Python Software Foundation / CPythonaffected 0 before 3.10.21; affected 3.11.0 before 3.11.16; affected 3.12.0 before 3.12.14; affected 3.13.0 before 3.13.14; affected 3.14.0 before 3.14.6; affected 3.15.0a1 before 3.15.0b3

CWE

CWE-121

References

ADP enrichment

CVE

No English description supplied.

CISA-ADP

No English description supplied.

No references supplied.