CVE-2025-4948

Libsoup: integer underflow in soup_multipart_new_from_message() leading to denial of service in libsoup

HIGH 7.5

At a glance

Source: NVD
EPSS: EPSS 0.81 % · percentile 57 (2026-10-28)
State: PUBLISHED
Published: 2025-05-19 15:55 UTC
Updated: 2026-06-30 14:27 UTC
Assigner: redhat
NVD status: Deferred

Description

A flaw was found in the soup_multipart_new_from_message() function of the libsoup HTTP library, which is commonly used by GNOME and other applications to handle web communications. The issue occurs when the library processes specially crafted multipart messages. Due to improper validation, an internal calculation can go wrong, leading to an integer underflow. This can cause the program to access invalid memory and crash. As a result, any application or server using libsoup could be forced to exit unexpectedly, creating a denial-of-service (DoS) risk.

Weaknesses (CWE)

CWE-191 — Integer Underflow (Wrap or Wraparound)

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · secalert@redhat.com (Secondary)

European references

ENISA EUVD · EUVD-2025-15741
GCVE · GCVE-0-2025-4948

CERT-FR advisories

CERTFR-2025-AVI-0938 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Affected products

Product	Versions
libsoup	affected 0 ≤ 3.6.5
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:3.6.5-3.el10_0.6 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:2.62.2-9.el7_9 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:2.62.2-6.el7_9 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.62.3-9.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.62.3-9.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected 0:2.62.3-1.el8_2.5 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:2.62.3-2.el8_4.5 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:2.62.3-2.el8_6.5 < *
Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected 0:2.62.3-2.el8_6.5 < *
Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	unaffected 0:2.62.3-2.el8_6.5 < *
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support	unaffected 0:2.62.3-3.el8_8.5 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.72.0-10.el9_6.2 < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	unaffected 0:2.72.0-8.el9_0.5 < *
Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support	unaffected 0:2.72.0-8.el9_2.5 < *
Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support	unaffected 0:2.72.0-8.el9_4.5 < *
Red Hat · Red Hat Enterprise Linux 6

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD