CVE-2025-49176

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

Description

A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking against the maximum allowed size, potentially causing an integer overflow and bypassing the size check.

Remediation

Workaround:

  • Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support EXTENSION
Affected: Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 6
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2025:10258 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10342 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10343 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10344 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10346 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10347 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10348 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10349 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10350 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10351 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10352 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10355 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10356 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10360 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10370 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10374 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10375 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10376 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10377 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10378 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10381 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10410 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9303 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9304 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9305 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9306 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9392 vendor advisory
https://access.redhat.com/errata/RHSA-2025:9964 vendor advisory
https://access.redhat.com/security/cve/CVE-2025-49176 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2369954 issue tracking
http://www.openwall.com/lists/oss-security/2025/06/18/2

Frequently Asked Questions

What is the severity of CVE-2025-49176?
CVE-2025-49176 has been scored as a high severity vulnerability.
How to fix CVE-2025-49176?
As a workaround for remediating CVE-2025-49176: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Is CVE-2025-49176 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-49176 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49176?
CVE-2025-49176 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION, Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support EXTENSION, Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Red Hat Enterprise Linux 6.
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