Bug 2373234 (CVE-2025-6069) - CVE-2025-6069 cpython: Python HTMLParser quadratic complexity
Summary: CVE-2025-6069 cpython: Python HTMLParser quadratic complexity
Keywords:
Status: NEW
Alias: CVE-2025-6069
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2373252 2373236 2373237 2373238 2373240 2373241 2373242 2373243 2373244 2373245 2373246 2373247 2373248 2373249 2373250 2373251 2373253
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-06-17 16:12 UTC by OSIDB Bzimport
Modified: 2026-01-21 23:58 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2025:23697 0 None None None 2025-12-18 20:15:29 UTC
Red Hat Product Errata RHBA-2025:23749 0 None None None 2025-12-22 01:25:37 UTC
Red Hat Product Errata RHBA-2025:23839 0 None None None 2025-12-22 09:32:50 UTC
Red Hat Product Errata RHBA-2026:0056 0 None None None 2026-01-05 11:41:14 UTC
Red Hat Product Errata RHBA-2026:0058 0 None None None 2026-01-05 11:59:18 UTC
Red Hat Product Errata RHSA-2025:23342 0 None None None 2025-12-18 12:23:10 UTC
Red Hat Product Errata RHSA-2025:23530 0 None None None 2025-12-18 01:16:08 UTC

Description OSIDB Bzimport 2025-06-17 16:12:16 UTC 
The html.parser.HTMLParser class had worse-case quadratic complexity when processing certain crafted malformed inputs potentially leading to amplified denial-of-service.
Comment 2 errata-xmlrpc 2025-12-18 01:16:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:23530 https://access.redhat.com/errata/RHSA-2025:23530
Comment 3 errata-xmlrpc 2025-12-18 12:23:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:23342 https://access.redhat.com/errata/RHSA-2025:23342
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