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CVE-2025-8194 is a high-severity denial-of-service vulnerability in CPython’s standard-library tarfile module. The flaw affects TarFile extraction and entry-enumeration APIs when processing maliciously crafted tar archives containing negative member offsets. Due to improper validation of archive member offsets during parsing, tarfile can accept invalid negative offsets and enter an infinite loop or deadlock instead of rejecting the archive. The provided supporting content identifies the vulnerable code path as involving tar archive member offset handling, including TarInfo-related block processing, and notes that the upstream fix adds validation to reject negative offsets and raise a ReadError.
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Cross-references every affected SKU, including bundled OEM variants.
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