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CVE Record

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

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).

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2025-32049 is a denial-of-service flaw in libsoup WebSocket handling. A remote unauthenticated sender may cause excessive memory allocation by sending a large WebSocket message, potentially making affected services unavailable. The supplied sources list multiple affected Red Hat Enterprise Linux streams and advisories.

Executive priority

Patch on a normal high-priority vulnerability timeline, faster for exposed WebSocket services. This is not described as data theft or code execution, but it can create service outages without authentication. Business urgency depends on whether affected libsoup-based WebSocket services are externally reachable or support critical workflows.

Technical view

The flaw is mapped to CWE-770 and affects SoupWebsocketConnection behavior in libsoup/libsoup3. CVSS 3.1 is 7.5, with network attack vector, low complexity, no privileges, no user interaction, and high availability impact only. The provided data does not show confidentiality or integrity impact.

Likely exposure

Most relevant exposure is servers or applications using affected libsoup or libsoup3 builds to accept WebSocket connections, especially if reachable over a network. The supplied affected list focuses on RHEL 7 ELS, RHEL 8 variants, RHEL 9 variants, and RHEL 10. RHEL 6 status is listed as unknown.

Exploitation context

The CVSS vector indicates unauthenticated network exploitation with low complexity, but the bundle marks KEV as false and provides no cited evidence of active exploitation. Treat this as a realistic availability risk for exposed WebSocket services rather than proven in-the-wild compromise.

Researcher notes

The key research question is reachability: package presence alone does not prove exploitable exposure. Validate whether SoupWebsocketConnection is used in server-side paths and whether large inbound messages can reach it. The supplied bundle does not include exploit proof, workaround details, or active exploitation evidence.

Mitigation direction

  • Apply the applicable Red Hat security advisory updates for affected RHEL streams.
  • Prioritize internet-facing or partner-facing WebSocket services using libsoup or libsoup3.
  • Check GNOME libsoup and Red Hat guidance for upstream and distribution-specific fixes.
  • Reduce unnecessary network exposure for affected WebSocket endpoints until patched.
  • Monitor affected services for memory exhaustion, crashes, or restart loops.

Validation and detection

  • Inventory systems with installed libsoup or libsoup3 packages.
  • Compare installed package versions with the affected Red Hat versions in the source bundle.
  • Identify applications using libsoup WebSocket server functionality.
  • Confirm updated packages align with the relevant RHSA advisory for each RHEL stream.
  • Review telemetry for availability incidents consistent with memory exhaustion.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-770: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2025-32049 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
17Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2025-32049Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Made public.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorlibsouplibsoup, 0unknown
Red HatRed Hat Enterprise Linux 10libsoup3, 0:3.6.5-3.el10_0.6affected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportlibsoup, 0:2.62.2-9.el7_9affected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportlibsoup, 0:2.62.2-6.el7_9affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-9.el8_10affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-9.el8_10affected
Red HatRed Hat Enterprise Linux 8.2 Advanced Update Supportlibsoup, 0:2.62.3-1.el8_2.5affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_4.5affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Servicelibsoup, 0:2.62.3-2.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutionslibsoup, 0:2.62.3-2.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.8 Extended Update Supportlibsoup, 0:2.62.3-3.el8_8.5affected
Red HatRed Hat Enterprise Linux 9libsoup, 0:2.72.0-10.el9_6.2affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionslibsoup, 0:2.72.0-8.el9_0.5affected
Red HatRed Hat Enterprise Linux 9.2 Extended Update Supportlibsoup, 0:2.72.0-8.el9_2.5affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportlibsoup, 0:2.72.0-8.el9_4.5affected
Red HatRed Hat Enterprise Linux 6libsoupunknown
Weakness

CWE details

CWE-770

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-770 · source CWE mapping

Allocation of Resources Without Limits or Throttling

Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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