CVE-2018-1092

Aliases:UBUNTU-CVE-2018-1092DEBIAN-CVE-2018-1092
Advisory lineage Upstream: 0 Downstream: 25
Modified
Published: 02 Apr 2018, 03:00
Last modified:05 Aug 2024, 03:51

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
7.1 HIGH
v2.0 (nvd)
EPSS Score
1.85% LOW
2% probability +1.62%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Apr 2018, 03:00
Published
Vulnerability first disclosed
05 Aug 2024, 03:51
Last Modified
Vulnerability information updated

Description

The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.

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
  • v2.0•HIGH•Score: 7.1AV:N/AC:M/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 1.85%• Percentile: 78%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•linux

    < 4.15.17-1 | < 4.15.17-1 | < 4.15.17-1 | < 4.15.17-1

  • ubuntu•linux

    < 3.13.0-157.207 | < 4.4.0-128.154 | < 4.15.0-23.25

  • ubuntu•linux-aws

    < 4.4.0-1023.23 | < 4.4.0-1061.70 | < 4.15.0-1010.10

  • ubuntu•linux-azure

    < 4.15.0-1013.13~16.04.2 | < 4.15.0-1013.13

  • 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

    < 4.13.0-1019.23 | < 4.15.0-1009.9

  • ubuntu•linux-gcp-6.11

    all

  • ubuntu•linux-gke

    all

  • ubuntu•linux-hwe

    < 4.15.0-24.26~16.04.1

  • ubuntu•linux-hwe-6.11

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1027.32 | < 4.15.0-1011.11

  • ubuntu•linux-lowlatency-hwe-6.11

    all

  • ubuntu•linux-lts-xenial

    < 4.4.0-128.154~14.04.1

  • ubuntu•linux-oem

    < 4.13.0-1030.33 | < 4.15.0-1008.11

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1091.99 | < 4.15.0-1012.13 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all | all

  • ubuntu•linux-snapdragon

    < 4.4.0-1094.99

  • linux•linux_kernel

    ≤ 4.15.15

References (32)