Integer overflow in X.org Xwayland
CVE-2025-49176
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (26.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- X.org Xwayland — versions 0
- Red Hat Enterprise Linux 10 — versions 0:24.1.5-4.el10_0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 6 Extended Lifecycle Support - Extension — versions 0:1.1.0-25.el6_10.1
- Red Hat Enterprise Linux 7.7 Advanced Update Support — versions 0:1.8.0-17.el7_7.1
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:1.20.4-32.el7_9, 0:1.8.0-36.el7_9.2
- Red Hat Enterprise Linux 8 — versions 0:1.20.11-26.el8_10, 0:21.1.3-18.el8_10, 0:1.15.0-7.el8_10
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:1.9.0-15.el8_2.14, 0:1.20.6-4.el8_2
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:1.20.10-2.el8_4, 0:1.11.0-8.el8_4.13
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On — versions 0:1.20.10-2.el8_4, 0:1.11.0-8.el8_4.13
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2025:10258 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10342 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10343 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10344 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10346 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10347 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10348 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10349 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10350 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:10351 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-49176?
- CVE-2025-49176 is a high-severity vulnerability in X.org Xwayland, classified under Integer Overflow or Wraparound. CVSS score: 7.3/10. Published 2025-06-17.
- How severe is CVE-2025-49176?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2025-49176 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.