CVE-2026-92823
Libmodulemd: libmodulemd: missing decompressed-size limit when parsing compressed yaml
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Libmodulemd: libmodulemd: missing decompressed-size limit when parsing compressed yaml
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.
- Record
CVE-2026-92823- 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 - Weakness
- CWE-409
- Updated
- 2026-11-06
EUVDEUVD-2026-107036
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.
- Record
EUVD-2026-107036- 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 - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-x9m8-9g38-v659
A flaw was found in libmodulemd. In builds with rpmio support enabled, compressed modulemd YAML...
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.
- Record
GHSA-x9m8-9g38-v659- 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 - Weakness
- CWE-409
- Updated
- 2026-11-06
NVD
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.
- Record
CVE-2026-92823- 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 - Weakness
- CWE-409
- Updated
- 2026-11-06
OSVDEBIAN-CVE-2026-92823
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.
- Record
DEBIAN-CVE-2026-92823- 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 - Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-92823
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.
- Record
UBUNTU-CVE-2026-92823- 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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libmodulemdDebian:12 |
All versions, plus listed versions 2.14.0-32.15.0-12.15.2-12.15.2-22.15.2-32.15.2-42.15.3-1 |
None known |
libmodulemdDebian:13 |
All versions, plus listed versions 2.15.0-12.15.2-12.15.2-22.15.2-32.15.2-42.15.3-1 |
None known |
libmodulemdDebian:14 |
All versions, plus listed versions 2.15.0-12.15.2-12.15.2-22.15.2-32.15.2-42.15.3-1 |
None known |
libmodulemdUbuntu:22.04:LTS |
All versions, plus listed versions 2.12.0-12.13.0-1 |
None known |
libmodulemdUbuntu:24.04:LTS |
All versions, plus listed versions 2.14.0-32.14.0-3build12.14.0-3build2 |
None known |
libmodulemdUbuntu:26.10 |
All versions, plus listed versions 2.15.2-32.15.2-42.15.3-1 |
None known |
libmodulemdUbuntu:26.04:LTS |
All versions, plus listed versions 2.15.0-12.15.2-12.15.2-3 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| products | CVE List, EUVD, GitHub Advisories, NVD | |
| facts, references | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-92823 is a medium vulnerability (CVSS 6.2) in Red Hat Enterprise Linux 10, published October 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 8th percentile. No source names a fixed version.
References
access.redhat.com/security/cve/CVE-2026-92823
bugzilla.redhat.com/show_bug.cgi?id=2478703
github.com/advisories/GHSA-x9m8-9g38-v659
nvd.nist.gov/vuln/detail/CVE-2026-92823
security-tracker.debian.org/tracker/CVE-2026-92823
ubuntu.com/security/CVE-2026-92823
cve.org/CVERecord?id=CVE-2026-92823