Bug 2427906 (CVE-2026-0719)

Summary: CVE-2026-0719 libsoup: Signed to Unsigned Conversion Error Leading to Stack-Based Buffer Overflow in libsoup NTLM Authentication
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can overflow due to improper use of signed integers. This results in incorrect memory allocation on the stack, followed by unsafe memory copying. As a result, applications using libsoup may crash unexpectedly, creating a denial-of-service risk.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2427910, 2427911, 2427907, 2427908, 2427909, 2427912    
Bug Blocks:    

Description OSIDB Bzimport 2026-01-08 12:14:54 UTC
A stack-based buffer overflow vulnerability exists in the md4sum() function of libsoup’s NTLM authentication module (SoupAuthNTLM). When NTLM authentication is enabled, insufficient bounds checking on stack-allocated buffers can allow a local attacker to overwrite adjacent memory. This may result in arbitrary code execution with the privileges of the affected application. Multiple widely deployed components, including WebKit, Evolution, GVfs, and gnome-online-accounts, enable NTLM by default, increasing exposure.

Comment 1 errata-xmlrpc 2026-02-04 19:14:25 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:1948 https://access.redhat.com/errata/RHSA-2026:1948

Comment 2 errata-xmlrpc 2026-02-05 03:30:11 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:2005 https://access.redhat.com/errata/RHSA-2026:2005

Comment 3 errata-xmlrpc 2026-02-05 03:32:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:2006 https://access.redhat.com/errata/RHSA-2026:2006

Comment 4 errata-xmlrpc 2026-02-05 03:43:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:2008 https://access.redhat.com/errata/RHSA-2026:2008

Comment 5 errata-xmlrpc 2026-02-05 04:05:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:2007 https://access.redhat.com/errata/RHSA-2026:2007

Comment 6 errata-xmlrpc 2026-02-05 10:02:30 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:2049 https://access.redhat.com/errata/RHSA-2026:2049

Comment 7 errata-xmlrpc 2026-02-05 19:23:35 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:2182 https://access.redhat.com/errata/RHSA-2026:2182

Comment 8 errata-xmlrpc 2026-02-09 02:12:00 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2214 https://access.redhat.com/errata/RHSA-2026:2214

Comment 9 errata-xmlrpc 2026-02-09 02:28:03 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2215 https://access.redhat.com/errata/RHSA-2026:2215

Comment 10 errata-xmlrpc 2026-02-09 02:49:15 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:2216 https://access.redhat.com/errata/RHSA-2026:2216

Comment 11 errata-xmlrpc 2026-02-10 08:42:20 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:2396 https://access.redhat.com/errata/RHSA-2026:2396

Comment 12 errata-xmlrpc 2026-02-10 09:07:12 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:2402 https://access.redhat.com/errata/RHSA-2026:2402

Comment 13 errata-xmlrpc 2026-02-11 07:41:09 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:2512 https://access.redhat.com/errata/RHSA-2026:2512

Comment 14 errata-xmlrpc 2026-02-11 07:49:28 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:2513 https://access.redhat.com/errata/RHSA-2026:2513

Comment 15 errata-xmlrpc 2026-02-11 08:04:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:2514 https://access.redhat.com/errata/RHSA-2026:2514

Comment 16 errata-xmlrpc 2026-02-11 10:31:10 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:2529 https://access.redhat.com/errata/RHSA-2026:2529

Comment 17 errata-xmlrpc 2026-02-11 10:32:46 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:2528 https://access.redhat.com/errata/RHSA-2026:2528

Comment 18 errata-xmlrpc 2026-02-12 09:09:17 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:2628 https://access.redhat.com/errata/RHSA-2026:2628