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CVE Record

CVE-2025-2784: Libsoup: heap buffer over-read in `skip_insignificant_space` when sniffing content

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

HighCVSS 7Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2025-2784 is a libsoup memory-read flaw triggered while processing a crafted HTTP response. A vulnerable client can read one byte outside its heap buffer. Business risk is mainly service instability, with limited confidentiality and integrity impact reported by the CVSS vector.

Executive priority

Treat this as high priority patching for affected Linux endpoints and servers, especially where software consumes external HTTP content. It is not currently documented as exploited in the provided sources, but availability impact is high and vendor advisories exist.

Technical view

The flaw is a CWE-125 heap buffer over-read in libsoup content sniffing, associated with skip_insignificant_space in the title and a similarly named function in the description. A malicious HTTP server response can cause a libsoup client to read one byte out of bounds. CVSS is 7.0, with high attack complexity and high availability impact.

Likely exposure

Exposure is most likely on Red Hat systems using affected libsoup or libsoup3 packages, including listed RHEL 7 ELS, 8, selected 8.x support streams, 9, selected 9.x streams, and 10. RHEL 6 status is listed as unknown. Non-Red Hat exposure is not fully described in the provided sources.

Exploitation context

The bundle does not show CISA KEV listing, and no provided source states active exploitation. The attack scenario requires a crafted HTTP response from a server to a vulnerable libsoup client. The CVSS vector marks network attack, no privileges, no user interaction, but high attack complexity.

Researcher notes

Evidence supports a small out-of-bounds read during content sniffing, not arbitrary code execution. Source naming differs between skip_insignificant_space and skip_insight_whitespace, so verify against upstream GNOME issue details. Avoid over-scoping beyond listed Red Hat packages and Debian/GNOME references without additional vendor data.

Mitigation direction

  • Apply the relevant Red Hat errata updates for affected RHEL streams.
  • Prioritize systems where libsoup clients fetch untrusted or internet-hosted HTTP content.
  • For non-Red Hat distributions, check vendor advisories before assuming fixed or unaffected status.
  • Monitor Red Hat CVE and GNOME libsoup issue references for updated remediation details.

Validation and detection

  • Inventory installed libsoup and libsoup3 packages across Linux fleets.
  • Compare package versions and streams against the affected list and Red Hat errata.
  • Identify applications linking to libsoup that process external HTTP responses.
  • Confirm patched packages are installed after maintenance windows.
  • Track RHEL 6 separately because the provided status is unknown.
Prepared
Confidence
high
Sources
12

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-125: 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-2025-2784 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 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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
2ADP providers
17Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: 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
7CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H2.24.7redhat

Vulnerability scoring details

Base CVSS 3.1 score

7High
CVSS 3.1 vector shape for CVE-2025-2784Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  3. Source timelineredhat

    Reported to Red Hat.

  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
CVECVE Program Container

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_0affected
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-125

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

CWE-125 · source CWE mapping

Out-of-bounds Read

Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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