CVE-2009-0747: n/a vulnerability

CVE-2009-0747: The ext4_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6...

The ext4_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 uses the i_size_high structure member during operations on arbitrary types of files, which allows local users to cause a denial of service (CPU consumption and error-message flood) by attempting to mount a crafted ext4 filesystem.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 04:48 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2009-0747 is an old Linux kernel ext4 denial-of-service issue. A local user who can try to mount a crafted ext4 filesystem could drive CPU consumption and flood error messages. It does not describe remote code execution or data theft, but it can affect availability on exposed legacy systems. Exposure is most plausible on legacy Linux systems, appliances, or virtualized products still using affected 2.6.27 or 2.6.28 kernels. Systems where untrusted local users can mount filesystems have higher practical exposure. Treat this as a legacy availability risk, not a modern emergency. Prioritize only where old kernels remain in production or where local users can mount filesystems. Mitigation focus: Upgrade affected Linux kernels to vendor-fixed versions or later.; Review Red Hat, Debian, Ubuntu, VMware, and kernel advisories for exact packages.; Restrict untrusted local users from mounting filesystems where feasible..

Prepared: Jun 28, 2026, 11:23 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Feb 27, 2009, 17:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:8585CVE reference · vdb-entry, signature
oval:org.mitre.oval:def:9200CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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