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CVE Record

CVE-2025-32910: Libsoup: null pointer deference on libsoup via /auth/soup-auth-digest.c through "soup_auth_digest_authenticate" on client when server omits the "realm" parameter in an unauthorized response with digest authentication

A flaw was found in libsoup, where soup_auth_digest_authenticate() is vulnerable to a NULL pointer dereference. This issue may cause the libsoup client to crash.

MediumCVSS 6.5Not KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a crash bug in libsoup, an HTTP client library. A server response missing a Digest authentication value can make an affected client application terminate. The main business impact is availability: affected applications may crash when they contact a problematic or malicious service.

Executive priority

Treat as a moderate availability issue. Patch through normal vulnerability management, faster for client systems or services that contact untrusted HTTP endpoints. It does not indicate data theft or privilege escalation in the provided sources.

Technical view

libsoup's soup_auth_digest_authenticate() can hit a NULL pointer dereference when processing a Digest authentication unauthorized response that omits the realm parameter. The CVSS vector is network-reachable with low complexity, no privileges, user interaction required, and high availability impact only.

Likely exposure

Exposure is most likely in applications using affected libsoup client code. The bundle identifies Red Hat Enterprise Linux 9 libsoup as affected, RHEL 8 listed packages as affected, RHEL 10 libsoup3 as unaffected, and RHEL 6/7 status as unknown.

Exploitation context

The source bundle does not show CISA KEV listing or any cited claim of active exploitation. Practical impact is denial of service against a client application after it processes a malformed Digest authentication response.

Researcher notes

The affected condition is specific: Digest authentication handling when the unauthorized response lacks realm. Keep validation focused on package status, linked applications, and vendor patches. Do not assume exploit activity or broader product impact beyond the cited affected entries.

Mitigation direction

  • Apply Red Hat fixes from RHSA-2025:8292 where applicable.
  • Review Debian LTS guidance for affected Debian deployments.
  • Inventory applications that use libsoup for HTTP client requests.
  • Prioritize clients that contact untrusted or user-controlled HTTP services.
  • Check vendor advisories for unsupported or unknown-status platforms.

Validation and detection

  • Confirm installed libsoup or vendor package versions against advisories.
  • Identify applications linking to or bundling libsoup.
  • Review crash reports for NULL dereference patterns in Digest authentication handling.
  • Verify patched systems no longer report vulnerable package versions.
Prepared
Confidence
high
Sources
7

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-476: 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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2025-32910 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
2ADP providers
6Source 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
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H2.83.6redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2025-32910Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorlibsouplibsoup, 0unaffected
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 10libsoup3unaffected
Red HatRed Hat Enterprise Linux 6libsoupunknown
Red HatRed Hat Enterprise Linux 7libsoupunknown
Red HatRed Hat Enterprise Linux 9libsoupaffected
Weakness

CWE details

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

CWE-476 · source CWE mapping

NULL Pointer Dereference

NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.