CVE-2020-8992
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.41% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 35.6% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-02-14 04:27Z6 YR AGO
- Last updated
- 2024-08-04 10:19Z2 YR AGO
- Reserved
- 2020-02-14
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 9a5b1d5b7556476734652cc8320524a9ee35239bab02565e77a4ee99f29199a0
05 Affected products
06 References
- patchwork.ozlabs.orghttps://patchwork.ozlabs.org/patch/1236118/
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20200313-0003/
- lists.opensuse.orgopenSUSE-SU-2020:0336http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- usn.ubuntu.comUSN-4318-1https://usn.ubuntu.com/4318-1/
- usn.ubuntu.comUSN-4324-1https://usn.ubuntu.com/4324-1/
- usn.ubuntu.comUSN-4344-1https://usn.ubuntu.com/4344-1/
- usn.ubuntu.comUSN-4342-1https://usn.ubuntu.com/4342-1/
- usn.ubuntu.comUSN-4419-1https://usn.ubuntu.com/4419-1/
07 Fixed in
Debian 12
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-185.215
- linux-aws Fixed in 4.4.0-1110.121
- linux-aws-hwe Fixed in 4.15.0-1065.69~16.04.1
- linux-azure Fixed in 4.15.0-1077.82
- linux-gcp Fixed in 4.15.0-1060.64
- linux-hwe Fixed in 4.15.0-96.97~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1076.83
- linux-oracle Fixed in 4.15.0-1037.41~16.04.1
- linux-raspi2 Fixed in 4.4.0-1135.144
- linux-snapdragon Fixed in 4.4.0-1139.147
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux Fixed in 4.15.0-96.97
- linux-aws Fixed in 4.15.0-1065.69
- linux-aws-5.0 No fix yet
- linux-aws-5.3 Fixed in 5.3.0-1017.18~18.04.1
- linux-azure No fix yet
- linux-azure-5.3 Fixed in 5.3.0-1020.21~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 Fixed in 5.3.0-1018.19~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 Fixed in 4.15.0-1057.60
- linux-gke-5.0 Fixed in 5.0.0-1035.36
- linux-gke-5.3 Fixed in 5.3.0-1018.19~18.04.1
- linux-hwe Fixed in 5.3.0-51.44~18.04.2
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1058.59
- linux-oem Fixed in 4.15.0-1079.89
- linux-oem-osp1 Fixed in 5.0.0-1050.55
- linux-oracle Fixed in 4.15.0-1037.41
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 Fixed in 5.3.0-1016.18~18.04.1
- linux-raspi2 Fixed in 4.15.0-1060.64
- linux-raspi2-5.3 Fixed in 5.3.0-1023.25~18.04.1
- linux-snapdragon Fixed in 4.15.0-1076.83
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-azure-fde No fix yet
- linux-gke No fix yet
- linux-raspi2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-intel-iot-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- linux-aws Fixed in 4.4.0-1074.78Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1077.82~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-185.215~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 16.04 LTS
- linux-fips Fixed in 4.4.0-1042.47Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.