Medium Denial of service

CVE-2026-92822 — Libmodulemd: libmodulemd: unbounded recursion when parsing nested xmd yaml

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.

Published Oct 21, 2026 · Updated Oct 21, 2026 · Sources: CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database · CNA: redhat

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Red Hat

Hardened Images and 4 more

CVSS base

6.2

Medium · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Red Hat Hardened Images, Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 8…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (denial of service), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Red Hat	Hardened Images	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP
Red Hat	Red Hat Enterprise Linux 10	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP
Red Hat	Red Hat Enterprise Linux 8	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP
Red Hat	Red Hat Enterprise Linux 9	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP
Red Hat	Red Hat OpenShift Container Platform 4	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.2	CVSS 3.1	Medium	2.5	3.6	secalert@redhat.com via NIST National Vulnerability Database
6.2	CVSS 3.1	Medium	—	—	redhat via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: secalert@redhat.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-674 · Uncontrolled Recursion

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Track CPU/memory spikes and availability drops correlated with request patterns.

endpoint telemetry (EDR)resource metrics

Timeline

What happened to this CVE, newest first.

2026
Source status changed · Published → Received
Oct 21, 2026 · NIST National Vulnerability Database
Record published
Oct 21, 2026
Affected products added · red hat/red hat enterprise linux 10, red hat/red hat enterprise linux 8, red hat/red hat enterprise linux 9, red hat/red
Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
CVSS changed · 6.2
Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Published
Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
Record created in this database
Oct 21, 2026 · Alertas do Telegram
CVE published
Oct 21, 2026 · redhat

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 21, 2026 – Oct 21, 2026
1× Official description updated · Oct 21, 2026 – Oct 21, 2026

References

2 on the record

bugzilla.redhat.com/show_bug.cgi
issue-tracking, x_refsource_REDHAT, CVE Program (cve.org) e CISA ADP
access.redhat.com/security/cve/CVE-2026-92822
vdb-entry, x_refsource_REDHAT, CVE Program (cve.org) e CISA ADP

Elsewhere on this site

Red Hat
every CVE for this vendor

Denial of service
same class

CWE-674
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-114406 Ca-certificates: distrust emudhra intermediate ca certificates due to security concerns 40m
Medium CVE-2026-85518 Openscap: openscap: arbitrary file write via path traversal in source datastream decomposition 1h
Low CVE-2026-114236 Podman: goroutine/file-descriptor leak in storage/pkg/archive.applylayer and applyuncompressedlayer on malformed layers 12h
Medium CVE-2026-92823 Libmodulemd: libmodulemd: missing decompressed-size limit when parsing compressed yaml 17h
Medium CVE-2026-92824 Libmodulemd: libmodulemd: out-of-bounds read when emitting rpm-map artifacts 17h
Medium CVE-2026-114038 Device-mapper-multipath: device-mapper-multipath: information disclosure via malformed format string 20h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-92822 is "Libmodulemd: libmodulemd: unbounded recursion when parsing nested xmd yaml", rated Medium. It affects Hardened Images (Red Hat); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.2 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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