Libsoup: denial of service attack to websocket server
Priority MEDIUM 41CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 21 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.
Summary
A flaw was found in libsoup. The SoupWebsocketConnection may accept a large WebSocket message, which may cause libsoup to allocate memory and lead to a denial of service (DoS).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01074 65th percentileScored 2026-11-07
Fix Partial Red Hat: 12 advisoriesRed Hat: 21 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | libsoup | up to 3.6.4 | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | 3.6.5-3.el10_0.6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | 2.62.2-9.el7_9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 2.62.3-9.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 2.62.3-9.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | — | 2.62.3-1.el8_2.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | 2.62.3-2.el8_4.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | 2.62.3-2.el8_6.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | 2.62.3-2.el8_6.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | 2.62.3-2.el8_6.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | — | 2.62.3-3.el8_8.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 2.72.0-10.el9_6.2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | 2.72.0-8.el9_0.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 2.72.0-8.el9_2.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | 2.72.0-8.el9_4.5 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
- libsoup Vendor— Affected up to 3.6.4 Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 3.6.5-3.el10_0.6 Patch available CNA
- Red Hat Enterprise Linux 7 Extended Lifecycle Support VendorRed Hat Affected — Fixed in 2.62.2-9.el7_9 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 2.62.3-9.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 2.62.3-9.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8.2 Advanced Update Support VendorRed Hat Affected — Fixed in 2.62.3-1.el8_2.5 Patch available CNA
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 2.62.3-2.el8_4.5 Patch available CNA
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 2.62.3-2.el8_6.5 Patch available CNA
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service VendorRed Hat Affected — Fixed in 2.62.3-2.el8_6.5 Patch available CNA
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 2.62.3-2.el8_6.5 Patch available CNA
- Red Hat Enterprise Linux 8.8 Extended Update Support VendorRed Hat Affected — Fixed in 2.62.3-3.el8_8.5 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 2.72.0-10.el9_6.2 Patch available CNA
- Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 2.72.0-8.el9_0.5 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 2.72.0-8.el9_2.5 Patch available CNA
- Red Hat Enterprise Linux 9.4 Extended Update Support VendorRed Hat Affected — Fixed in 2.72.0-8.el9_4.5 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 21
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.0 | 10.0 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::appstream | 8 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:8::baseos | 8 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.2::appstream | 8.2 | — | Red Hat |
| cpe:/o:redhat:rhel_aus:8.2::baseos | 8.2 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.4::appstream | 8.4 | — | Red Hat |
| cpe:/o:redhat:rhel_aus:8.4::baseos | 8.4 | — | Red Hat |
| cpe:/a:redhat:rhel_aus:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:8.6::appstream | 8.6 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.0 Versions 10.0 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.2::appstream Versions 8.2 — ·Red Hat
- cpe:/o:redhat:rhel_aus:8.2::baseos Versions 8.2 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.4::appstream Versions 8.4 — ·Red Hat
- cpe:/o:redhat:rhel_aus:8.4::baseos Versions 8.4 — ·Red Hat
- cpe:/a:redhat:rhel_aus:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:8.6::appstream Versions 8.6 — ·Red Hat
Show 11 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:rhel_tus:8.6::appstream | 8.6 | — | Red Hat |
| cpe:/o:redhat:rhel_aus:8.6::baseos | 8.6 | — | Red Hat |
| cpe:/o:redhat:rhel_e4s:8.6::baseos | 8.6 | — | Red Hat |
| cpe:/o:redhat:rhel_tus:8.6::baseos | 8.6 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:8.8::appstream | 8.8 | — | Red Hat |
| cpe:/o:redhat:rhel_eus:8.8::baseos | 8.8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.0::appstream | 9.0 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.4::appstream | 9.4 | — | Red Hat |
| cpe:/o:redhat:rhel_els:6 | 6 | — | Red Hat |
- cpe:/a:redhat:rhel_tus:8.6::appstream Versions 8.6 — ·Red Hat
- cpe:/o:redhat:rhel_aus:8.6::baseos Versions 8.6 — ·Red Hat
- cpe:/o:redhat:rhel_e4s:8.6::baseos Versions 8.6 — ·Red Hat
- cpe:/o:redhat:rhel_tus:8.6::baseos Versions 8.6 — ·Red Hat
- cpe:/a:redhat:rhel_eus:8.8::appstream Versions 8.8 — ·Red Hat
- cpe:/o:redhat:rhel_eus:8.8::baseos Versions 8.8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.0::appstream Versions 9.0 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.4::appstream Versions 9.4 — ·Red Hat
- cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
Remediation
Red Hat 12 advisories
- RHSA-2025:21657 Released 2025-11-18 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux Server (v. 7 ELS) libsoup-2.62.2-9.el7_9, libsoup-2.62.2-9.el7_9.ppc, libsoup-devel-2.62.2-9.el7_9 +1
- RHSA-2025:9179 Released 2025-06-17 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux Server (v. 7 ELS) libsoup-2.62.2-6.el7_9, libsoup-devel-2.62.2-6.el7_9
- RHSA-2025:8663 Released 2025-06-09 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) libsoup-devel-2.62.3-2.el8_4.5
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) libsoup-2.62.3-2.el8_4.5
Show 9 more Red Hat advisories
- RHSA-2025:8482 Released 2025-06-04 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) libsoup-devel-2.62.3-2.el8_6.5
- Red Hat Enterprise Linux AppStream E4S (v.8.6) libsoup-devel-2.62.3-2.el8_6.5
- Red Hat Enterprise Linux AppStream TUS (v.8.6) libsoup-devel-2.62.3-2.el8_6.5
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) libsoup-2.62.3-2.el8_6.5
- Red Hat Enterprise Linux BaseOS E4S (v.8.6) libsoup-2.62.3-2.el8_6.5
- Red Hat Enterprise Linux BaseOS TUS (v.8.6) libsoup-2.62.3-2.el8_6.5
- RHSA-2025:8480 Released 2025-06-04 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) libsoup-devel-2.62.3-1.el8_2.5
- Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libsoup-2.62.3-1.el8_2.5
- RHSA-2025:8481 Released 2025-06-04 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) libsoup-2.72.0-8.el9_0.5, libsoup-devel-2.72.0-8.el9_0.5
- RHSA-2025:8252 Released 2025-05-28 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream EUS (v.8.8) libsoup-devel-2.62.3-3.el8_8.5
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) libsoup-2.62.3-3.el8_8.5
- RHSA-2025:8140 Released 2025-05-26 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) libsoup-2.72.0-8.el9_2.5, libsoup-devel-2.72.0-8.el9_2.5
- RHSA-2025:8139 Released 2025-05-26 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream EUS (v.9.4) libsoup-2.72.0-8.el9_4.5, libsoup-devel-2.72.0-8.el9_4.5
- RHSA-2025:8132 Released 2025-05-26 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream (v. 8) libsoup-devel-2.62.3-9.el8_10
- Red Hat Enterprise Linux BaseOS (v. 8) libsoup-2.62.3-9.el8_10
- RHSA-2025:8128 Released 2025-05-26 · Red Hat rating Importantlibsoup3 security update
- Red Hat Enterprise Linux AppStream (v. 10) libsoup3-3.6.5-3.el10_0.6, libsoup3-devel-3.6.5-3.el10_0.6
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsoup3-doc-3.6.5-3.el10_0.6
- RHSA-2025:8126 Released 2025-05-26 · Red Hat rating Importantlibsoup security update
- Red Hat Enterprise Linux AppStream (v. 9) libsoup-2.72.0-10.el9_6.2, libsoup-devel-2.72.0-10.el9_6.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2025:8128 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2025:8132 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:8126 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2025:8480 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2025:8663 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux AppStream E4S (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:8481 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2025:8252 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2025:8140 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:8139 |
| Red Hat Enterprise Linux AppStream TUS (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:8132 |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | RHSA-2025:8480 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2025:8663 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2025:8252 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.6) | Fixed | RHSA-2025:8482 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2025:8128 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:21657 |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-32049
- 2026-10-03 Alias added: GHSA-fqvp-p5gx-qqhg
- 2026-11-01 Affected versions changed · CNA
- 2026-11-01 Affected versions changed · Red Hat
References
Advisory 11
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Sources
- CVE-2025-32049 · CVE Program
- CVE-2025-32049 · NVD
- FIRST EPSS
- GHSA-fqvp-p5gx-qqhg · GitHub Advisory Database · CC BY 4.0
- CVE-2025-32049 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences