CVE-2026-9669

HIGH EPSS 29.4%
Published Jun 8, 20263w ago · Modified Jun 23, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published Jun 8, 2026 3w ago
Last Modified Jun 23, 2026 1w ago

Description

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.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
29.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

References 8

  • openwall.com http://www.openwall.com/lists/oss-security/2026/06/08/17
  • github.com https://github.com/python/cpython/commit/157a5df8cb5d82b33f918a7489e72ce95ceb12b6
  • github.com https://github.com/python/cpython/commit/5755d0f083949ff3c5bf3a37e673e24e306b036e
  • github.com https://github.com/python/cpython/commit/619a12b2e545391dc436b3af79dda22337382a6f
  • github.com https://github.com/python/cpython/commit/d3ca26983dfbccdf609f24ff5877dc3118e4702d
  • github.com https://github.com/python/cpython/issues/150599
  • github.com https://github.com/python/cpython/pull/150600
  • mail.python.org https://mail.python.org/archives/list/security-announce@python.org/thread/DBJZETMGUIFK7DVUWMOXHD3Z6IX2QPSX/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.