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CVE-2009-0747

Publication date 27 February 2009

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

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.

From the Ubuntu Security Team

The ext4 filesystem did not correctly validate certain type fields. A local attacker could mount a malicious ext4 filesystem, causing a system crash, leading to a denial of service.

Status

Package Ubuntu Release Status
linux 9.04 jaunty
Not affected
8.10 intrepid
Fixed 2.6.27-11.31
8.04 LTS hardy
Fixed 2.6.24-23.52
7.10 gutsy Not in release
6.06 LTS dapper Not in release
linux-source-2.6.15 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy Not in release
6.06 LTS dapper
Not affected
linux-source-2.6.22 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy
Fixed 2.6.22-16.62
6.06 LTS dapper Not in release

References

Related Ubuntu Security Notices (USN)

    • USN-751-1
    • Linux kernel vulnerabilities
    • 6 April 2009

Other references