CVE-2009-4308

High

The ext4_decode_error function in fs/ext4/super.c in the ext4 filesystem in the Linux kernel before 2.6.32 allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference), and possibly have unspecified other impact, via a crafted read-only filesystem that lacks a journal.

Package Linux Kernel
Published 2009-12-13
Last modified 2026-04-23
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

7.1

out of 10
High
Attack Vector
Network
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
None
Integrity
None
Availability
Vector string
AV:N/AC:M/Au:N/C:N/I:N/A:C

Weakness type

CWE-399

CVE-2009-4308 is classified as CWE-399

See CWE-399 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2009-4308 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2009-4308?

    CVE-2009-4308 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . CVE-2009-4308 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2009-4308?

    CVE-2009-4308 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 2.0). The vector string is AV:N/AC:M/Au:N/C:N/I:N/A:C .

  • Is there a patch available for CVE-2009-4308?

    No patch is currently available for CVE-2009-4308. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2009-4308 actively exploited?

    No — CVE-2009-4308 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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