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CVE Record

CVE-2025-32988: Gnutls: vulnerability in gnutls othername san export

A flaw was found in GnuTLS. A double-free vulnerability exists in GnuTLS due to incorrect ownership handling in the export logic of Subject Alternative Name (SAN) entries containing an otherName. If the type-id OID is invalid or malformed, GnuTLS will call asn1_delete_structure() on an ASN.1 node it does not own, leading to a double-free condition when the parent function or caller later attempts to free the same structure. This vulnerability can be triggered using only public GnuTLS APIs and may result in denial of service or memory corruption, depending on allocator behavior.

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

GnuTLS can mishandle a malformed certificate Subject Alternative Name and free the same memory twice. Affected software may crash or suffer memory corruption while processing the entry. The supplied assessment rates it CVSS 6.5: serious for availability, but exploitation requires a higher-complexity condition and no confidentiality impact is identified.

Executive priority

Schedule remediation promptly within the normal vulnerability cycle, accelerating internet-facing and business-critical certificate-processing services. The principal business risk is service disruption. Broader compromise is not established by the supplied evidence, and active exploitation is not reported.

Technical view

Incorrect ownership handling in GnuTLS otherName SAN export causes an ASN.1 node to be freed despite not being owned by that function. Later cleanup can free it again. Public GnuTLS APIs can trigger the flaw using an invalid or malformed type-id OID, potentially causing denial of service or allocator-dependent memory corruption.

Likely exposure

Exposure exists where affected GnuTLS packages or Red Hat products process and export certificates containing otherName SAN entries. The bundle identifies affected RHEL 8, 9, 10, OpenShift 4, Ceph Storage 7, and several containers. RHEL 6 and 7 status remains unknown.

Exploitation context

The CVSS vector describes network reachability, no privileges or user interaction, and high attack complexity. The bundle reports denial of service or memory corruption, but provides no evidence of active exploitation; it is not listed in KEV. No confidentiality impact is asserted.

Researcher notes

CWE-415 applies. Triggerability through public APIs broadens the potentially affected application surface, but practical reachability depends on whether an application invokes the vulnerable SAN export path on attacker-influenced certificates. Allocator behavior determines whether the observed result is a crash or memory corruption. The bundle does not establish code execution.

Mitigation direction

  • Apply the relevant Red Hat security advisory updates for each affected platform and package.
  • Check GnuTLS and downstream vendor guidance for products not explicitly covered by the listed advisories.
  • Prioritize externally reachable or availability-critical services that process untrusted certificates.
  • Restart or redeploy dependent services after updating, following vendor operational guidance.

Validation and detection

  • Inventory installed GnuTLS packages, containers, and applications linked to the library.
  • Compare package versions against the applicable Red Hat advisory for each supported product stream.
  • Identify services that export or inspect otherName SAN certificate entries.
  • Confirm updated services loaded the corrected library after restart or redeployment.
  • Monitor affected services for crashes or memory-corruption signals during certificate processing.
Prepared
Confidence
high
Sources
6

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-415: 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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description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2025-32988 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
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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
3ADP providers
15Source 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:H/PR:N/UI:N/S:U/C:N/I:L/A:H2.24.2redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2025-32988Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

    Reported to Red Hat.

  2. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  3. Source timelineredhat

    Made public.

  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
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorlibgnutlslibgnutls, 0unaffected
Red HatRed Hat Enterprise Linux 10gnutls, 0:3.8.9-9.el10_0.14affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.4affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.4affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-6.el9_6.2affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-6.el9_6.2affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionsgnutls, 0:3.7.6-21.el9_2.4affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportgnutls, 0:3.8.3-4.el9_4.4affected
Red HatRed Hat Ceph Storage 7rhceph/rhceph-7-rhel9, 7affected
Red HatRed Hat Discovery 2discovery/discovery-ui-rhel9, 2.3.0-1760554384affected
Red HatRed Hat Hardened Imagesgnutls-main, 3.8.12-1.1.hum1affected
Red HatRed Hat Insights proxy 1.5insights-proxy/insights-proxy-container-rhel9, 1.5.7-1759331989affected
Red HatRed Hat Enterprise Linux 6gnutlsunknown
Red HatRed Hat Enterprise Linux 7gnutlsunknown
Red HatRed Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-9affected
Weakness

CWE details

CWE-415

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

CWE-415 · source CWE mapping

Double Free

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

Open CWE intelligenceSame-CWE CVEs