https://seclists.org/oss-sec/2026/q2/122: [oss-security][CVE-2026-6100] CPython: Use-after-fe in lzma.LZMADecompssor, bz2.BZ2Decompssor, and gzip.GzipFile after -use under memory pssu

Published Apr 13, 2026
·
Updated

Affected Software

1 affected component
Python CPython
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-6100?

CVE-2026-6100 is classified as a medium-severity vulnerability due to its potential to cause application crashes or unexpected behavior.

2

What components are affected by CVE-2026-6100?

CVE-2026-6100 affects lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile in CPython.

3

How do I fix CVE-2026-6100?

To fix CVE-2026-6100, upgrade to the patched version of Python CPython where this vulnerability has been addressed.

4

What is the nature of the issue in CVE-2026-6100?

CVE-2026-6100 is a use-after-free vulnerability that occurs under memory pressure when reusing decompressor objects.

5

Can CVE-2026-6100 lead to arbitrary code execution?

While CVE-2026-6100 primarily leads to potential crashes, it doesn't directly enable arbitrary code execution.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203