# CVE-2026-92824: Libmodulemd: libmodulemd: out-of-bounds read when emitting rpm-map artifacts

Status: published. Published: 2026-10-21. Updated: 2026-11-04.

A flaw was found in libmodulemd. In the module stream v2 rpm-map emission path, an inner loop incorrectly uses the count of digest algorithms as its bound instead of the number of checksums in the current digest table. Crafted modulemd v2 metadata with multiple digest types can trigger an out-of-bounds read during YAML serialization, typically causing a crash and resulting in a denial of service.

## Remediation

- workaround: Until a fixed package is available, avoid round-tripping untrusted modulemd v2 documents that include artifacts.rpm-map. If untrusted metadata must be accepted, reject or strip rpm-map content with multiple digest algorithms before serializing the parsed object. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (libmodulemd): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (libmodulemd): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libmodulemd): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (libmodulemd): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6.2 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CVSS 3.1: 6.2 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-04; percentile 1.69%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-92824 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2478495 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/fedora-modularity/libmodulemd/pull/643 (CNA: redhat)

- https://access.redhat.com/security/cve/CVE-2026-92824 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2478495 (secalert@redhat.com)

- https://github.com/fedora-modularity/libmodulemd/pull/643 (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-92824; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-92824; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-92824; retrieved 2026-11-04; source updated Not reported

Revision: b2ab0c323ae66f3dba0248c094b37e15ed5f084e33ad734c86dc0938fb04345d

Canonical: https://y2.dev/cve/CVE-2026-92824

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