UBUNTU-CVE-2012-2100

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2012-2100
Published: 12 Apr 2012, 00:00
Last modified:04 Feb 2026, 02:17

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Apr 2012, 00:00
Published
Vulnerability first disclosed
04 Feb 2026, 02:17
Last Modified
Vulnerability information updated

Description

The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

Affected Systems

  • ubuntu•linux

    < 3.11.0-12.19 | < 4.2.0-16.19

  • ubuntu•linux-aws

    < 4.4.0-1002.2 | < 4.4.0-1001.10

  • ubuntu•linux-flo

    < 3.4.0-1.3 | < 3.4.0-5.22

  • ubuntu•linux-gke

    < 4.4.0-1003.3

  • ubuntu•linux-goldfish

    < 3.4.0-1.9 | < 3.4.0-4.27

  • ubuntu•linux-hwe

    < 4.8.0-36.36~16.04.1

  • ubuntu•linux-lts-utopic

    < 3.16.0-25.33~14.04.2

  • ubuntu•linux-lts-vivid

    < 3.19.0-18.18~14.04.1

  • ubuntu•linux-lts-wily

    < 4.2.0-18.22~14.04.1

  • ubuntu•linux-lts-xenial

    < 4.4.0-13.29~14.04.1

  • ubuntu•linux-mako

    < 3.4.0-3.21 | < 3.4.0-7.40

  • ubuntu•linux-manta

    < 3.4.0-4.19

  • ubuntu•linux-raspi2

    < 4.2.0-1013.19

  • ubuntu•linux-snapdragon

    < 4.4.0-1012.12

References (11)