UBUNTU-CVE-2018-1093

Advisory lineage Upstream: 1 Downstream: 6
Upstream
CVE-2018-1093
Published: 01 Apr 2018, 00:00
Last modified:12 May 2026, 13:47

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
3.0 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Apr 2018, 00:00
Published
Vulnerability first disclosed
12 May 2026, 13:47
Last Modified
Vulnerability information updated

Description

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.5CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•linux

    < 3.13.0-157.207 | < 4.4.0-128.154 | < 4.15.0-33.36

  • ubuntu•linux-aws

    < 4.4.0-1023.23 | < 4.4.0-1061.70 | < 4.15.0-1020.20

  • ubuntu•linux-azure

    < 4.15.0-1022.22~16.04.1 | < 4.15.0-1022.23

  • ubuntu•linux-azure-6.11

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fde-5.15

    all

  • ubuntu•linux-fips

    < 4.4.0-1008.10

  • ubuntu•linux-gcp

    < 4.15.0-1018.19~16.04.2 | < 4.15.0-1018.19

  • ubuntu•linux-gcp-6.11

    all

  • ubuntu•linux-gke

    all

  • ubuntu•linux-hwe

    < 4.15.0-33.36~16.04.1

  • ubuntu•linux-hwe-6.11

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1027.32 | < 4.15.0-1020.20

  • ubuntu•linux-lowlatency-hwe-6.11

    all

  • ubuntu•linux-lts-xenial

    < 4.4.0-128.154~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1017.20

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1091.99 | < 4.15.0-1021.23 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all | all

  • ubuntu•linux-snapdragon

    < 4.4.0-1094.99

References (9)