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.

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

EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.

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.

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)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, 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.