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CVE-2011-2493

Publication date 24 June 2011

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

The ext4_fill_super function in fs/ext4/super.c in the Linux kernel before 2.6.39 does not properly initialize a certain error-report data structure, which allows local users to cause a denial of service (OOPS) by attempting to mount a crafted ext4 filesystem.

From the Ubuntu Security Team

Sami Liedes discovered that ext4 did not correctly handle missing root inodes. A local attacker could trigger the mount of a specially crafted filesystem to cause the system to crash, leading to a denial of service.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-11.47
10.10 maverick
Not affected
10.04 LTS lucid
Not affected
8.04 LTS hardy
Not affected
linux-ec2 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Ignored
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-fsl-imx51 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-lts-backport-maverick 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-lts-backport-natty 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.38-11.49~lucid1
8.04 LTS hardy Not in release
linux-lts-backport-oneiric 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-mvl-dove 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick
Not affected
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-ti-omap4 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-1209.15
10.10 maverick
Not affected
10.04 LTS lucid Not in release
8.04 LTS hardy Not in release

Notes

apw

this was introduced in v2.6.36-rc1 by commit 66e61a9e9504f61b9a928c9055368c81da613a50

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

References

Related Ubuntu Security Notices (USN)

    • USN-1256-1
    • Linux kernel (Natty backport) vulnerabilities
    • 9 November 2011
    • USN-1212-1
    • Linux kernel (OMAP4) vulnerabilities
    • 21 September 2011
    • USN-1193-1
    • Linux kernel vulnerabilities
    • 19 August 2011

Other references