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

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Summary

CVECVE-2025-66287
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-04 17:15:56 UTC
Updated2026-06-29 21:16:37 UTC
DescriptionA flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.003850000 probability, percentile 0.303890000 (date 2026-07-01)

Problem Types: CWE-120 | CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The WebKitGTK Team WebKitGTK affected 2.50.3 semver Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:2.50.3-2.el7_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:2.50.3-1.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support unaffected 0:2.50.3-2.el8_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:2.50.3-2.el8_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:2.50.3-2.el8_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:2.50.3-2.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service unaffected 0:2.50.3-2.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions unaffected 0:2.50.3-2.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:2.50.3-2.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:2.50.3-2.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:2.50.3-1.el9_7 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions unaffected 0:2.50.3-1.el9_0 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 0:2.50.3-1.el9_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support unaffected 0:2.50.3-1.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:2.50.3-1.el9_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2025:23452 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23434 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:22790 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23583 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:22789 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23451 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23110 [email protected] access.redhat.com
webkitgtk.org/security/WSA-2025-0009.html [email protected] webkitgtk.org
access.redhat.com/security/cve/CVE-2025-66287 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23433 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23591 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:23743 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
access.redhat.com/errata/RHSA-2025:23742 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2025-12-04T16:04:58.978ZReported to Red Hat.
CNA2025-12-04T00:00:00.000ZMade public.

Workarounds

CNA: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

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