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CVE-2026-9669 is a stack buffer overflow vulnerability in Python's bz2.BZ2Decompressor. A decompressor object can remain reusable after a decompression error. If an application catches the resulting OSError and retries with the same object, crafted compressed input can resume decompression from an invalid internal state and trigger out-of-bounds writes to a stack buffer. Processing untrusted data under these conditions can crash the Python process.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stack buffer overflow triggered by crafted input in the affected Python 3.11 packages covered by SUSE advisory SUSE-SU-2026:4396-1. The supplied CVSS v4 vector indicates high availability impact.
A stack buffer overflow vulnerability triggered by crafted input in the affected SUSE Python packages. The description does not identify the specific vulnerable function or establish code execution. Security updates are available; Nessus detection relies on self-reported version information.
A stack buffer overflow triggered by crafted input affects Python packages covered by the SUSE SLES15 advisory. The plugin attributes a CVSS v4 base score of 8.2 to this vulnerability, with high availability impact; the description does not identify the vulnerable function.
A vulnerability addressed by the Rocky Linux 9.6/TuxCare security notice. The listed CVSS v4 assessment indicates a network-reachable issue with high availability impact, though exploitation requires high attack complexity and an attack prerequisite.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.