Evidence used
- No CISA KEV confirmation is currently recorded.
- A structured source references public exploit or proof-of-concept material.
- EPSS is 0.12% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-92822High confidence
Libmodulemd: libmodulemd: unbounded recursion when parsing nested xmd yaml
Red Hat · Red Hat Enterprise Linux 10
6.2MediumCVSS 3.1
Within 7 days
Fix not verifiedMedium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:Medium, unchanged from published severity.unchanged
Compensating controls
- Restrict local access and enforce least privilege on affected hosts.
- Increase monitoring for the attack path and post-exploitation behaviour described in the report.
Verification
- Confirm that the asset runs Red Hat Red Hat Enterprise Linux 10 and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Distribution package intelligence
5 package statesRelease-specific package status
Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Debian trixietrixie · source | libmodulemd | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian bookwormbookworm · source | libmodulemd | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian forkyforky · source | libmodulemd | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian sidsid · source | libmodulemd | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Ubuntu 24.04 LTSnoble · standard archive | libmodulemd | Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing. | Not published in this feed | Canonical Ubuntu Security ↗Source updated 23 Oct 2026 |
Direct vendor intelligence
2 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
CVE-2026-92822 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-92822
The vendor explicitly identifies these products as affected by this CVE.
- libmodulemd as component of SUSE Linux Enterprise Desktop 15 SP7
- libmodulemd2 as component of SUSE Linux Enterprise Desktop 15 SP7
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- modulemd-validator as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- python3-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- libmodulemd-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- modulemd-validator as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- Summary
- A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
- Remediation
- No remediation text is recorded.
CVE-2026-92822 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibmodulemd: libmodulemd: unbounded recursion when parsing nested xmd YAML
The vendor explicitly identifies these products as affected by this CVE.
- libmodulemd-devel as a component of Red Hat Enterprise Linux 10
- libmodulemd.src as a component of Red Hat Enterprise Linux 10
- python3-libmodulemd as a component of Red Hat Enterprise Linux 10
- libmodulemd-devel as a component of Red Hat Enterprise Linux 8
- libmodulemd.src as a component of Red Hat Enterprise Linux 8
- libmodulemd1 as a component of Red Hat Enterprise Linux 8
- python3-libmodulemd as a component of Red Hat Enterprise Linux 8
- libmodulemd-devel as a component of Red Hat Enterprise Linux 9
- libmodulemd.src as a component of Red Hat Enterprise Linux 9
- python3-libmodulemd as a component of Red Hat Enterprise Linux 9
- libmodulemd.src as a component of Red Hat Hardened Images
- openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4
- Summary
- A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
- Remediation
- Until a fix is available, avoid parsing untrusted modulemd documents that may contain attacker-controlled xmd data. If such input must be accepted, reject unusually deep or large xmd structures before handing them to libmodulemd, and isolate parsing in a process with strict stack, CPU, and memory limits.
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified01
What, why and how
A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
What
A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
Why
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
How
An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
What
A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
Why
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
How
An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material Reference recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.
- Likely attack path
- local access → Uncontrolled Recursion → disrupt the affected service
- Attack surface
- Local
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-674 ↗
CWE-674: Uncontrolled Recursion. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix not verified
- Affected
- libmodulemd as component of SUSE Linux Enterprise Desktop 15 SP7
- libmodulemd2 as component of SUSE Linux Enterprise Desktop 15 SP7
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- modulemd-validator as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- python3-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- libmodulemd-devel as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- modulemd-validator as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- python3-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- python311-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- python311-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- python311-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- libmodulemd2 as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- python311-libmodulemd as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- typelib-1_0-Modulemd-2_0 as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- and 104 more
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 21 Oct 2026 · Last source change 21 Oct 2026, 20:42 UTC · CWE-674 · Uncontrolled Recursion
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-10-21
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-107037
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- ENISA EUVD mappingEUVD-2026-107037 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-107037"}
- Public exploit evidencePublic exploit evidence changed from Public exploit reference to Public exploit reference.CVE.org ↗
- Before
- Public exploit reference
- After
- Public exploit reference
- Public exploit evidencePublic exploit evidence changed from No public exploit to Public exploit reference.bugzilla.redhat.com ↗
- Before
- No public exploit
- After
- Public exploit reference
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.