Red Hat Security Advisory: python3.11 security update
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * cpython: Excessive read buffering DoS in http.client (CVE-2025-13836) * cpython: python: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service (CVE-2025-12084) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory addresses two denial of service vulnerabilities in the Python 3.11 package for Red Hat Enterprise Linux 9.4 Extended Update Support. CVE-2025-13836 involves excessive read buffering in the http.client module, which can be exploited to cause a denial of service. CVE-2025-12084 concerns a quadratic time complexity algorithm in xml.dom.minidom that can be triggered to cause denial of service. Red Hat has released updated python3.11 packages that fix these issues. The advisory references Red Hat Bugzilla entries 2418078 and 2418655 for the respective CVEs. No CVSS scores are provided, but the vendor rates the impact as moderate.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions in applications using the affected Python 3.11 modules. This may result in application or service unavailability. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Red Hat has released updated python3.11 packages for Red Hat Enterprise Linux 9.4 Extended Update Support that address these vulnerabilities. Users should apply the official security update as described in Red Hat advisory RHSA-2026:1893 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation is indicated or required beyond applying the vendor-provided update.
Red Hat Security Advisory: python3.11 security update
Description
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * cpython: Excessive read buffering DoS in http.client (CVE-2025-13836) * cpython: python: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service (CVE-2025-12084) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory addresses two denial of service vulnerabilities in the Python 3.11 package for Red Hat Enterprise Linux 9.4 Extended Update Support. CVE-2025-13836 involves excessive read buffering in the http.client module, which can be exploited to cause a denial of service. CVE-2025-12084 concerns a quadratic time complexity algorithm in xml.dom.minidom that can be triggered to cause denial of service. Red Hat has released updated python3.11 packages that fix these issues. The advisory references Red Hat Bugzilla entries 2418078 and 2418655 for the respective CVEs. No CVSS scores are provided, but the vendor rates the impact as moderate.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions in applications using the affected Python 3.11 modules. This may result in application or service unavailability. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Red Hat has released updated python3.11 packages for Red Hat Enterprise Linux 9.4 Extended Update Support that address these vulnerabilities. Users should apply the official security update as described in Red Hat advisory RHSA-2026:1893 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation is indicated or required beyond applying the vendor-provided update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:1893
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-13836"]
Threat ID: 6a3da1c64853345fc1820492
Added to database: 06/25/2026, 21:46:46 UTC
Last enriched: 06/25/2026, 21:57:58 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 21
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