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CVE Record

CVE-2025-32907: Libsoup: denial of service in server when client requests a large amount of overlapping ranges with range header

A flaw was found in libsoup. The implementation of HTTP range requests is vulnerable to a resource consumption attack. This flaw allows a malicious client to request the same range many times in a single HTTP request, causing the server to use large amounts of memory. This does not allow for a full denial of service.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2025-32907 is a medium-severity memory consumption flaw in libsoup’s HTTP range request handling. A malicious client can send one request with many repeated or overlapping ranges, making a server allocate excessive memory. The sources say this reduces availability but does not allow a full denial of service.

Executive priority

Treat this as a moderate availability risk. It is not described as data theft, code execution, or full outage, but exposed services could experience avoidable memory pressure. Patch through vendor channels during normal vulnerability maintenance, faster for externally reachable services.

Technical view

libsoup’s server-side range request implementation can mishandle many duplicated ranges in a single Range header, causing elevated memory use. CVSS 3.1 is 5.3, network-reachable, low complexity, no privileges, no user interaction, with low availability impact only. Red Hat lists affected RHEL package streams and related advisories.

Likely exposure

Most relevant exposure is internet- or network-facing software using libsoup to serve HTTP content. Red Hat lists affected streams for RHEL 9, RHEL 10 libsoup3, and some RHEL 8 packages. RHEL 6 and 7 status is unknown in the bundle.

Exploitation context

The bundle does not report active exploitation, and KEV is false. Exploitation appears remote and unauthenticated when a vulnerable libsoup-based server accepts HTTP requests, but impact is limited to memory pressure and partial availability degradation per the provided description.

Researcher notes

Evidence supports resource consumption through repeated overlapping HTTP ranges, not compromise. Affected-product details come mainly from Red Hat’s CVE metadata and advisories. The bundle does not provide a fixed upstream version, detailed exploit status, or complete status for RHEL 6 and 7.

Mitigation direction

  • Apply the relevant Red Hat security advisory updates for affected RHEL package streams.
  • Check GNOME libsoup and distribution guidance for current fixed packages or mitigations.
  • Reduce exposure of vulnerable libsoup-based HTTP services to untrusted clients where feasible.
  • Monitor memory usage and request patterns on services that process HTTP Range headers.
  • Prioritize externally reachable services before internal-only or client-only software.

Validation and detection

  • Inventory installed libsoup and libsoup3 packages across RHEL systems.
  • Map which applications use libsoup server-side HTTP request handling.
  • Confirm applicable RHSA updates are installed on affected package streams.
  • Review edge and application logs for unusual Range-heavy requests.
  • Verify service memory behavior remains stable under normal traffic.
Prepared
Confidence
high
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

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cwe · low confidence lookup

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cve · low confidence lookup

CVE-2025-32907 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (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:L

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
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical 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
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4redhat

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2025-32907Attack 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:L

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, 0unaffected
Red HatRed Hat Enterprise Linux 10libsoup3, 0:3.6.5-3.el10_0.6affected
Red HatRed Hat Enterprise Linux 8mingw-freetype, 0:2.8-3.el8_10.1affected
Red HatRed Hat Enterprise Linux 8spice-client-win, 0:8.10-1affected
Red HatRed Hat Enterprise Linux 9libsoup, 0:2.72.0-10.el9_6.1affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionslibsoup, 0:2.72.0-8.el9_0.4affected
Red HatRed Hat Enterprise Linux 9.2 Extended Update Supportlibsoup, 0:2.72.0-8.el9_2.4affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportlibsoup, 0:2.72.0-8.el9_4.4affected
Red HatRed Hat Enterprise Linux 6libsoupunknown
Red HatRed Hat Enterprise Linux 7libsoupunknown
Red HatRed Hat Enterprise Linux 8libsoupunaffected
Weakness

CWE details

CWE-1050

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

CWE-1050 · source CWE mapping

Excessive Platform Resource Consumption within a Loop

Excessive Platform Resource Consumption within a Loop represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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