// For flags

CVE-2025-49176

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

Severity Score

6.6
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

*Credits: Red Hat would like to thank Julian Suleder and Nils Emmerich for reporting this issue.
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-06-03 CVE Reserved
  • 2025-06-17 CVE Published
  • 2025-06-23 EPSS Updated
  • 2025-06-30 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-190: Integer Overflow or Wraparound
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Red Hat
Search vendor "Red Hat"
 Enterprise Linux
Search vendor "Red Hat" for product "Enterprise Linux"
*-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
*-
Affected
Slackware
Search vendor "Slackware"
 Slackware Linux
Search vendor "Slackware" for product "Slackware Linux"
*-
Affected