# CVE-2025-32049: Libsoup: denial of service attack to websocket server

Status: published. Published: 2025-04-03. Updated: 2026-11-05.

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).

## Remediation

- workaround: No mitigation is currently available for this vulnerability. (source: CNA: redhat)

## Affected products and versions

-  /  (libsoup): ≥ 0; ≤ 3.6.4 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (libsoup3): ≥ 0:3.6.5-3.el10_0.6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support (libsoup): ≥ 0:2.62.2-9.el7_9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (libsoup): ≥ 0:2.62.3-9.el8_10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (libsoup): ≥ 0:2.62.3-1.el8_2.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (libsoup): ≥ 0:2.62.3-2.el8_4.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (libsoup): ≥ 0:2.62.3-2.el8_6.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (libsoup): ≥ 0:2.62.3-2.el8_6.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (libsoup): ≥ 0:2.62.3-2.el8_6.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support (libsoup): ≥ 0:2.62.3-3.el8_8.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libsoup): ≥ 0:2.72.0-10.el9_6.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions (libsoup): ≥ 0:2.72.0-8.el9_0.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support (libsoup): ≥ 0:2.72.0-8.el9_2.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support (libsoup): ≥ 0:2.72.0-8.el9_4.5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (libsoup): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.89% as of 2026-11-05; percentile 59.48%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-770

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2025:21657 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8126 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8128 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8132 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8139 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8140 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8252 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8480 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8481 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8482 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:8663 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2025-32049 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2357066 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://gitlab.gnome.org/GNOME/libsoup/-/issues/390 (CNA: redhat)

- https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/408 (CNA: redhat)

- https://access.redhat.com/errata/RHSA-2025:21657 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8126 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8128 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8132 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8139 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8140 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8252 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8480 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8481 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8482 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:8663 (secalert@redhat.com)

- https://access.redhat.com/security/cve/CVE-2025-32049 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2357066 (secalert@redhat.com)

- https://gitlab.gnome.org/GNOME/libsoup/-/issues/390 (secalert@redhat.com)

- https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/408 (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2025-32049; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-32049; retrieved 2026-11-02; source updated 2026-11-01

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-32049; retrieved 2026-11-05; source updated Not reported

Revision: 3f68088446153e9e1d5b7990d8aec1d136b980fd2219f5048982904f4c9eae52

Canonical: https://y2.dev/cve/CVE-2025-32049

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