UBUNTU-CVE-2020-8992

Advisory lineage Upstream: 1 Downstream: 5
Upstream
CVE-2020-8992
Published: 14 Feb 2020, 05:15
Last modified:22 Apr 2026, 12:44

Vulnerability Summary

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

Timeline

14 Feb 2020, 05:15
Published
Vulnerability first disclosed
22 Apr 2026, 12:44
Last Modified
Vulnerability information updated

Description

ext4_protect_reserved_inode in fs/ext4/block_validity.c in the Linux kernel through 5.5.3 allows attackers to cause a denial of service (soft lockup) via a crafted journal size.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•linux

    < 4.4.0-185.215 | < 4.15.0-96.97

  • ubuntu•linux-aws

    < 4.4.0-1074.78 | < 4.4.0-1110.121 | < 4.15.0-1065.69

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    < 5.3.0-1017.18~18.04.1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1065.69~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1077.82~14.04.1 | < 4.15.0-1077.82 | all

  • ubuntu•linux-azure-5.3

    < 5.3.0-1020.21~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-fips

    < 4.4.0-1042.47

  • ubuntu•linux-gcp

    < 4.15.0-1060.64 | all

  • ubuntu•linux-gcp-5.3

    < 5.3.0-1018.19~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gke

    all

  • ubuntu•linux-gke-4.15

    < 4.15.0-1057.60

  • ubuntu•linux-gke-5.0

    < 5.0.0-1035.36

  • ubuntu•linux-gke-5.3

    < 5.3.0-1018.19~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-96.97~16.04.1 | < 5.3.0-51.44~18.04.2

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1076.83 | < 4.15.0-1058.59

  • ubuntu•linux-lts-xenial

    < 4.4.0-185.215~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1079.89

  • ubuntu•linux-oem-osp1

    < 5.0.0-1050.55

  • ubuntu•linux-oracle

    < 4.15.0-1037.41~16.04.1 | < 4.15.0-1037.41

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    < 5.3.0-1016.18~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1135.144 | < 4.15.0-1060.64 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1023.25~18.04.1

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all

  • ubuntu•linux-snapdragon

    < 4.4.0-1139.147 | < 4.15.0-1076.83

References (9)