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SRC: CVELISTV5 / SYNC: T-4M / LAG: 8M / REC: 386,737 / REV: C6-1C / V4

01 RecordSTATE: PUBLISHED

CVE-2025-66287

Webkitgtk: processing maliciously crafted web content may lead to an unexpected process crash

HighPUBLISHEDCNA: redhat

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

02 Description

CNA: redhat

Webkitgtk: processing maliciously crafted web content may lead to an unexpected process crash

03 Exploitation and scoring

SRC: CISA, FIRST, NVD, RED HAT

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 39.0% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-06-29.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

SCHEMA: 5.2

Published

2025-12-04 16:48Z9 MO AGO

Last updated

2026-06-29 20:44Z2 MO AGO

Reserved

2025-11-26

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

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

Data version

5.2

Document digest

855d56010d3a5281cdef1451a723e582963fed9d515ace1c81771a90996ae56f

05 Affected products

PAIRS: 18

VendorProductVersionsPlatforms

The WebKitGTK TeamWebKitGTK0 to < 2.50.3—

Red HatRed Hat Enterprise Linux 7 Extended Lifecycle SupportNot specified—

Red HatRed Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 8.2 Advanced Update SupportNot specified—

Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportNot specified—

Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnNot specified—

Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportNot specified—

Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update ServiceNot specified—

Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceNot specified—

Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 9Not specified—

Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP SolutionsNot specified—

Red HatRed Hat Enterprise Linux 9.4 Extended Update SupportNot specified—

Red HatRed Hat Enterprise Linux 9.6 Extended Update SupportNot specified—

Red HatRed Hat Enterprise Linux 6Not specified—

Red HatRed Hat Enterprise Linux 7Not specified—

06 References

REFS: 14

access.redhat.comRHSA-2025:22789https://access.redhat.com/errata/RHSA-2025:22789vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:22790https://access.redhat.com/errata/RHSA-2025:22790vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23110https://access.redhat.com/errata/RHSA-2025:23110vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23433https://access.redhat.com/errata/RHSA-2025:23433vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23434https://access.redhat.com/errata/RHSA-2025:23434vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23451https://access.redhat.com/errata/RHSA-2025:23451vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23452https://access.redhat.com/errata/RHSA-2025:23452vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23583https://access.redhat.com/errata/RHSA-2025:23583vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23591https://access.redhat.com/errata/RHSA-2025:23591vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23742https://access.redhat.com/errata/RHSA-2025:23742vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2025:23743https://access.redhat.com/errata/RHSA-2025:23743vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-66287vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2418857https://bugzilla.redhat.com/show_bug.cgi?id=2418857issue-trackingx_refsource_REDHAT
webkitgtk.orghttps://webkitgtk.org/security/WSA-2025-0009.html