Buffer overflow in The Webkitgtk Team
CVE-2025-66287
A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- The Webkitgtk Team — versions 0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:2.50.3-2.el7_9
- Red Hat Enterprise Linux 8 — versions 0:2.50.3-1.el8_10
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:2.50.3-2.el8_2
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:2.50.3-2.el8_4
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On — versions 0:2.50.3-2.el8_4
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:2.50.3-2.el8_6
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service — versions 0:2.50.3-2.el8_6
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2025:22789 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:22790 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23110 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23433 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23434 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23451 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23452 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23583 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23591 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:23742 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-66287?
- CVE-2025-66287 is a high-severity vulnerability in The Webkitgtk Team, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-12-04.
- How severe is CVE-2025-66287?
- High severity. CVSS v3 base score is 8.8 out of 10.