CVE-2011-4086

Impact:
Moderate
Public Date:
2012-01-25
Bugzilla:
749143: CVE-2011-4086 kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS

The MITRE CVE dictionary describes this issue as:

The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.

Find out more about CVE-2011-4086 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0107.html, https://rhn.redhat.com/errata/RHSA-2012-0571.html, and https://rhn.redhat.com/errata/RHSA-2012-0670.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.

CVSS v2 metrics

Base Score 4.9
Base Metrics AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 5 (kernel) RHSA-2012:0107 2012-02-09
Red Hat Enterprise Linux 6 (kernel) RHSA-2012:0571 2012-05-15
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2012:0670 2012-05-15

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Will not fix

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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