dbcve.org
Debian LinuxOperating system · Debian

CVE-2025-68615

CRITICAL · 9.8 CVSS v3.1 Published 2025-12-23
Fix available
A fix is available. Upgrade to 5.9.5 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
net-snmp is a SNMP application library, tools and daemon. Prior to versions 5.9.5 and 5.10.pre2, a specially crafted packet to an net-snmp snmptrapd daemon can cause a buffer overflow and the daemon to crash. This issue has been patched in versions 5.9.5 and 5.10.pre2.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A buffer overflow vulnerability in net-snmp's snmptrapd daemon allows remote attackers to cause a denial of service (daemon crash) via a specially crafted SNMP packet. The vulnerability exists in versions prior to 5.9.5 and 5.10.pre2.

MitigationUpgrade net-snmp to version 5.9.5 or 5.10.pre2 or later. If immediate patching is not feasible, restrict network access to the snmptrapd service to prevent unauthenticated packet receipt.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Debian LinuxOperating system
Affected:= 11.0
Net SnmpApplication
Affected:< 5.9.5= 5.10

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify net-snmp installation
    Run 'dpkg -l | grep net-snmp' on Debian or 'rpm -qa | grep net-snmp' / 'snmpd -V' to check if net-snmp packages are installed
    Affected if net-snmp is not installed - not affected
  2. Check snmptrapd version
    Run 'snmptrapd -V' or 'dpkg -l | grep snmptrapd' to retrieve the installed version number
    Affected if version is prior to 5.9.5 or equals 5.10 (before pre2)
  3. Confirm snmptrapd service is running
    Run 'systemctl status snmptrapd' or 'ps aux | grep snmptrapd' to check if the daemon is active
    Affected if snmptrapd is not running - not affected
  4. Check snmptrapd network binding
    Run 'netstat -tulpn | grep snmptrapd' or 'ss -tulpn | grep snmptrapd' to see which interfaces the daemon listens on
    Affected if snmptrapd is bound to a network interface (0.0.0.0 or external IP) - vulnerable to remote attack

User is affected if net-snmp version is below 5.9.5 or equals 5.10, snmptrapd is running, and the service is exposed to network access.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.9.5 or later
Fixed in 5.9.5
Interim mitigation

Upgrade net-snmp to version 5.9.5 or 5.10.pre2 or later. If immediate patching is not feasible, restrict network access to the snmptrapd service to prevent unauthenticated packet receipt.

Recommended fix High confidence

net-snmp version 5.9.5 or 5.10.pre2 (or later stable 5.10.x release)

  1. 1. Identify the current net-snmp version installed: 'snmpd -V' or check package manager (e.g., 'dpkg -l | grep snmp' on Debian)
  2. 2. Check if snmptrapd daemon is running: 'systemctl status snmptrapd' or 'ps aux | grep snmptrapd'
  3. 3. Stop the snmptrapd service before upgrading: 'systemctl stop snmptrapd'
  4. 4. Upgrade net-snmp to version 5.9.5 or 5.10.pre2 (or latest stable 5.10.x) using the system's package manager, or compile from source from net-snmp.org
  5. 5. For Debian: 'apt-get update && apt-get install libsnmp-dev snmp' after the fix is available in repositories
  6. 6. Verify the new version is installed: 'snmpd -V'
  7. 7. Restart snmptrapd service: 'systemctl start snmptrapd'
  8. 8. Verify the service is running without crashes: 'systemctl status snmptrapd'
Caveat Patch/minor upgrades typically have minimal breaking changes; test in staging environment before production deployment

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Debian Linux Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-68615 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data