Public Date:
722557: CVE-2011-2695 kernel: ext4: kernel panic when writing data to the last block of sparse file

The MITRE CVE dictionary describes this issue as:

Multiple off-by-one errors in the ext4 subsystem in the Linux kernel before 3.0-rc5 allow local users to cause a denial of service (BUG_ON and system crash) by accessing a sparse file in extent format with a write operation involving a block number corresponding to the largest possible 32-bit unsigned integer.

Find out more about CVE-2011-2695 from the MITRE CVE dictionary dictionary and NIST NVD.


This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via,, and This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not include support for EXT4 filesystem.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

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 version 5 (kernel) RHSA-2011:1386 2011-10-20
Red Hat Enterprise Linux version 6 (kernel) RHSA-2011:1189 2011-08-23
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2011:1253 2011-09-12

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 4 kernel Not affected