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NVD / CVE Program· CNA redhat

CVE-2025-3931: Yggdrasil: local privilege escalation in yggdrasil

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: github.com/RedHatInsights/yggdrasil yggdrasil 0.4.7.

Low priority for now. Upgrade to github.com/RedHatInsights/yggdrasil yggdrasil 0.4.7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in Yggdrasil, which acts as a system broker, allowing the processes to communicate to other children's "worker" processes through the DBus component. Yggdrasil creates a DBus method to dispatch messages to workers. However, it misses authentication and authorization checks, allowing every system user to call it. One available Yggdrasil worker acts as a package manager with capabilities to create and enable new repositories and install or remove packages. This flaw allows an attacker with access to the system to leverage the lack of authentication on the dispatch message to force the Yggdrasil worker to install arbitrary RPM packages. This issue results in local privilege escalation, enabling the attacker to access and modify sensitive system data.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 14, 2025
Updated
Nov 4, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-3931

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • github.com/RedHatInsights/yggdrasil yggdrasil

    • before 0.4.7affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • 0:0.4.5-3.el10_0 and laternot affected · rpm
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsunknown

  • Red Hat Red Hat Satellite 6

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10yggdrasilbefore 0.4.5-3.el10_00.4.5-3.el10_0
AlmaLinux:10yggdrasil-develbefore 0.4.5-3.el10_00.4.5-3.el10_0
Gogithub.com/redhatinsights/yggdrasilfrom 0—
Gogithub.com/redhatinsights/yggdrasilup to and including 0.4.6—
openSUSE:Tumbleweedgovulncheck-vulndbbefore 0.0.20250515T200012-1.10.0.20250515T200012-1.1
Red Hat:enterprise_linux:10.0yggdrasilbefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0
Red Hat:enterprise_linux:10.0yggdrasil-debuginfobefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0
Red Hat:enterprise_linux:10.0yggdrasil-debugsourcebefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0
Red Hat:enterprise_linux:10.0yggdrasil-develbefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0
Red Hat:enterprise_linux:10.0yggdrasil-examples-debuginfobefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0
Rocky Linux:10yggdrasilbefore 0:0.4.5-3.el10_00:0.4.5-3.el10_0

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-10230Samba: command injection in wins server hook script
    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
    44Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-4382May 9, 2025 · Grub2: grub allow access to encrypted device through cli once root device is unlocked via tpm
    23Monitor
  • ← EarlierCVE-2025-4432May 9, 2025 · Ring: some aes functions may panic when overflow checking is enabled in ring
    21Monitor
  • Later →CVE-2025-4476May 16, 2025 · Libsoup: null pointer dereference in libsoup may lead to denial of service
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
github.com/RedHatInsights/yggdrasil yggdrasil0.4.7Vendor (CNA)
almalinux:yggdrasil0.4.5-3.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:yggdrasil-devel0.4.5-3.el10_0 · AlmaLinux:10Package registry (OSV)
opensuse:govulncheck-vulndb0.0.20250515T200012-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:yggdrasil0:0.4.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:yggdrasil-debuginfo0:0.4.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:yggdrasil-debugsource0:0.4.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:yggdrasil-devel0:0.4.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:yggdrasil-examples-debuginfo0:0.4.5-3.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
rocky linux:yggdrasil0:0.4.5-3.el10_0 · Rocky Linux:10Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-280 · Improper Handling of Insufficient Permissions or Privileges

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records