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Linux KernelOperating system · Linux

CVE-2006-1858

HIGH · 7.8 CVSS v2.0 Published 2006-05-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
87/100
Remediation priority · High
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
SCTP in Linux kernel before 2.6.16.17 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a chunk length that is inconsistent with the actual length of provided parameters.

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

SCTP (Stream Control Transmission Protocol) implementation in Linux kernel before 2.6.16.17 contains a length validation flaw where the chunk length field in SCTP packets is not properly validated against the actual length of provided parameters, allowing malformed packets to trigger memory corruption leading to potential denial of service (crash) or arbitrary code execution.

MitigationUpgrade Linux kernel to version 2.6.16.17 or later to obtain the patched SCTP implementation; if immediate upgrade is not feasible, consider blocking or filtering SCTP traffic at network boundaries until the patch can be applied.

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
Linux KernelOperating system
Affected:= 2.6.0= 2.6.1= 2.6.2= 2.6.3= 2.6.4= 2.6.5= 2.6.6= 2.6.7= 2.6.8= 2.6.9= 2.6.10= 2.6.11

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
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:N/AC:L/Au:N/C:N/I:N/A:C

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. Check kernel version
    Run 'uname -r' or 'cat /proc/version' to obtain the running kernel version
    Affected if The kernel version is 2.6.0 through 2.6.11 inclusive, or any version earlier than 2.6.16.17 from the 2.6.x series
  2. Verify SCTP kernel module status
    Run 'lsmod | grep sctp' to see if the SCTP module is currently loaded
    Affected if The sctp module is loaded and the kernel version is in the affected range
  3. Check SCTP support in kernel
    Check /boot/config-$(uname -r) for 'CONFIG_IP_SCTP=m' or 'CONFIG_IP_SCTP=y', or run 'grep -i sctp /proc/config.gz' if available
    Affected if SCTP support is compiled into the kernel (y) or as a loadable module (m) on an affected kernel version
  4. Detect active SCTP listeners
    Run 'ss -an | grep sctp' or 'netstat -an | grep sctp' to list any SCTP ports currently in LISTEN state
    Affected if Any SCTP services are listening and the kernel version is in the affected range

You are affected if your kernel version is 2.6.0 through 2.6.11 and SCTP is enabled or in use on your system.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade Linux kernel to version 2.6.16.17 or later to obtain the patched SCTP implementation; if immediate upgrade is not feasible, consider blocking or filtering SCTP traffic at network boundaries until the patch can be applied.

Fix this in Linux Kernel Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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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-2006-1858 in production — separate from our analysis above.

No notes yet

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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