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Ubuntu LinuxOperating system · Canonical

CVE-2007-6427

HIGH · 9.3 CVSS v2.0 Published 2008-01-18
Fix available
A fix is available. Upgrade to 1.4.1 / 10.4.11 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

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
The XInput extension in X.Org Xserver before 1.4.1 allows context-dependent attackers to execute arbitrary code via requests related to byte swapping and heap corruption within multiple functions, a different vulnerability than CVE-2007-4990.

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
How this class of weakness works · CWE-787

The program writes past the bounds of a buffer, overwriting adjacent memory an attacker can turn to their advantage. Crafted input can overwrite control data and redirect execution. Remediation is validating every index and length before a write, plus modern memory-safety mitigations.

General guidance for the out-of-bounds write class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
Ubuntu LinuxOperating system
Affected:= 6.06= 6.10= 7.04= 7.10
Debian LinuxOperating system
Affected:= 3.1= 4.0
FedoraOperating system
Affected:= 7= 8
LinuxOperating system
Affected:= 10.1
X ServerApplication
Affected:< 1.4.1
Mac Os XOperating system
Affected:< 10.4.11>= 10.5.0, < 10.5.2
OpensuseOperating system
Affected:= 10.2= 10.3
Linux Enterprise DesktopOperating system
Affected:= 9= 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
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

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

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 1.4.1 / 10.4.11 / 10.5.2 or later
Fixed in 1.4.110.4.1110.5.2
Vendor patch bugs.gentoo.org →
Recommended fix High confidence

X.Org Xserver >= 1.4.1

  1. Identify the current X.Org Xserver version using 'Xorg -version' or 'xdpyinfo'
  2. For X.Org Xserver: upgrade to version 1.4.1 or later which contains the fix for the XInput extension byte swapping/heap corruption vulnerability
  3. For Ubuntu/Debian/Fedora/OpenSUSE/Linux Enterprise Desktop: apply vendor-supplied security updates for this CVE (often available via apt-get update && apt-get upgrade, yum update, or YaST online update)
  4. For Mac OS X: apply Apple security update 2007-009 (for 10.4.x) or update to 10.5.2 or later
  5. Restart the X server after applying updates (typically by logging out and back in, or rebooting)
Caveat Very old systems may have compatibility issues with newer X server versions; some legacy XInput drivers or applications may not function properly after upgrade

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $3,200. Get the upgrade done

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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-2007-6427 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
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