Libmodulemd: libmodulemd: missing decompressed-size limit when parsing compressed yaml
CVSS score
6.2
EPSS probability
—
Risk score
0.6
Published
2 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
A flaw exists in libmodulemd where builds with rpmio support enabled decompress compressed modulemd YAML through a custom read handler that lacks a cumulative decompressed-size limit (S0). An attacker can supply a highly compressible compressed YAML file to cause excessive CPU and memory consumption, leading to a denial of service (S0).
This vulnerability can enable resource consumption-based denial of service attacks on affected systems, threatening overall system stability (S0).
What should be done?
- Follow official vendor advisories (S0).
- Closely monitor updates as the patch status is currently unknown (S0).
Chain of evidence and sources
Libmodulemd, rpmio desteği etkin olan yapılarda sıkıştırılmış modül YAML verilerini işlerken kümülatif açılmış boyut sınırını denetlemez.
Sıkıştırılabilir bir YAML dosyası tedarik eden bir saldırgan, aşırı kaynak tüketimi yoluyla hizmet dışı bırakma durumuna neden olabilir.
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-409
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-92823 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 6.2 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVE CNA |
| 6.2 | CVSS V31 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-92823 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-92823 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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