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Vulnerability · Published Oct 21, 2026 · Assigned by redhat

CVE-2026-92823Libmodulemd: libmodulemd: missing decompressed-size limit when parsing compressed yaml

Medium 6.2

In plain English

A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.2%top 92.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in libmodulemd. In builds with rpmio support enabled, compressed modulemd YAML is decompressed through a custom read handler that does not enforce a cumulative decompressed-size limit before parsing. An attacker who can supply a highly compressible compressed YAML file can cause excessive CPU and memory consumption, resulting in a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libmodulemdno fix listedDEBIAN-CVE-2026-92823
Debian:13libmodulemdno fix listedDEBIAN-CVE-2026-92823
Debian:14libmodulemdno fix listedDEBIAN-CVE-2026-92823
Ubuntu:22.04:LTSlibmodulemdno fix listedUBUNTU-CVE-2026-92823
Ubuntu:24.04:LTSlibmodulemdno fix listedUBUNTU-CVE-2026-92823
Ubuntu:26.04:LTSlibmodulemdno fix listedUBUNTU-CVE-2026-92823
Ubuntu:26.10libmodulemdno fix listedUBUNTU-CVE-2026-92823

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Hardened Images see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 5 see references

Weakness: CWE-409 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References