Stack-based Buffer Overflow Affecting cpython package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published11 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
CVE-2026-9669 (opens in a new tab)How to fix?
There is no fixed version for cpython.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the bz2.BZ2Decompressor objects. An attacker can cause out-of-bounds writes to a stack buffer by reusing a decompressor object after a decompression error and providing crafted input. This can result in process crashes when handling untrusted data. This is only exploitable if an application catches the OSError from a decompression error and retries decompression with the same decompressor object.