Libsoup: integer underflow in soup_multipart_new_from_message() leading to denial of service in libsoup
Summary
| CVE | CVE-2025-4948 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-05-19 16:15:36 UTC |
| Updated | 2026-06-30 15:16:51 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.006250000 probability, percentile 0.454440000 (date 2026-06-29)
Problem Types: CWE-191 | CWE-191 Integer Underflow (Wrap or Wraparound)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.6.5-3.el10_0.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | unaffected 0:2.62.2-9.el7_9 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | unaffected 0:2.62.2-6.el7_9 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.62.3-9.el8_10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.62.3-9.el8_10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | unaffected 0:2.62.3-1.el8_2.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:2.62.3-2.el8_4.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:2.62.3-2.el8_6.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | unaffected 0:2.62.3-2.el8_6.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions | unaffected 0:2.62.3-2.el8_6.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | unaffected 0:2.62.3-3.el8_8.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:2.72.0-10.el9_6.2 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions | unaffected 0:2.72.0-8.el9_0.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | unaffected 0:2.72.0-8.el9_2.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | unaffected 0:2.72.0-8.el9_4.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 6 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| gitlab.gnome.org/GNOME/libsoup/-/issues/449 | [email protected] | gitlab.gnome.org | |
| access.redhat.com/errata/RHSA-2025:8128 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2025:9179 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8252 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8481 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8140 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8126 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8482 | [email protected] | access.redhat.com | |
| gitlab.gnome.org/GNOME/libsoup/-/work_items/449 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | gitlab.gnome.org | |
| access.redhat.com/errata/RHSA-2025:8663 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:21657 | [email protected] | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2025-4948 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8132 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8480 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:8139 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank fouzhe and zkbytes for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2025-05-19T05:22:19.904Z | Reported to Red Hat. |
| CNA | 2025-05-19T00:00:00.000Z | Made public. |
Workarounds
CNA: To mitigate this issue, Red Hat recommends avoiding the use of libsoup with untrusted or unauthenticated multipart HTTP message sources until updated packages are available. Administrators can deploy application-level filters or HTTP proxies that reject malformed multipart requests. It is strongly advised to apply vendor-supplied patches as soon as they are released to address this integer underflow vulnerability and restore the stability of affected services.
There are currently no legacy QID mappings associated with this CVE.