CVE-2020-25212
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in
02 Description
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in
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
- 0.27% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 19.6% of scored records. A rank, not a probability.
- NVD base score
- 7.0 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. 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
- 2020-09-09 15:52Z6 YR AGO
- Last updated
- 2024-08-04 15:33Z2 YR AGO
- Reserved
- 2020-09-09
- 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
- ef02e0422c977ea1ab75926e088c8dba19e577a1d0b1c6b315f3973eb3bb57fa
05 Affected products
06 References
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21
- twitter.comhttps://twitter.com/grsecurity/status/1303370421958578179
- cdn.kernel.orghttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3
- usn.ubuntu.comUSN-4527-1https://usn.ubuntu.com/4527-1/
- usn.ubuntu.comUSN-4525-1https://usn.ubuntu.com/4525-1/
- lists.debian.org[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- lists.opensuse.orgopenSUSE-SU-2020:1655http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- usn.ubuntu.comUSN-4578-1https://usn.ubuntu.com/4578-1/
- lists.opensuse.orgopenSUSE-SU-2020:1682http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html
- lists.opensuse.orgopenSUSE-SU-2020:1698http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- lists.debian.org[debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- lists.debian.org[debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
07 Fixed in
AlmaLinux 8
- kernel-tools-libs-devel Fixed in 4.18.0-305.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- kernel-tools-libs-devel Fixed in 4.18.0-305.el8
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 5.7.17-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.7.17-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.7.17-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-190.220
- linux-aws Fixed in 4.4.0-1114.127
- linux-aws-hwe Fixed in 4.15.0-1085.90~16.04.1
- linux-azure Fixed in 4.15.0-1098.109~16.04.1
- linux-gcp Fixed in 4.15.0-1086.98~16.04.1
- linux-hwe Fixed in 4.15.0-120.122~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1080.87
- linux-oracle Fixed in 4.15.0-1056.61~16.04.1
- linux-raspi2 Fixed in 4.4.0-1139.148
- linux-snapdragon Fixed in 4.4.0-1143.152
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 4.15.0-121.123
- linux-aws Fixed in 4.15.0-1086.91
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1025.25~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1099.110
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1026.26~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1086.98
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1025.25~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 Fixed in 4.15.0-1072.76
- linux-hwe No fix yet
- linux-hwe-5.4 Fixed in 5.4.0-48.52~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1077.79
- linux-oem Fixed in 4.15.0-1099.109
- linux-oracle Fixed in 4.15.0-1057.62
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1025.25~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1019.21~18.04.1
- linux-raspi2 Fixed in 4.15.0-1073.78
- linux-snapdragon Fixed in 4.15.0-1089.98
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux Fixed in 5.4.0-48.52
- linux-aws Fixed in 5.4.0-1025.25
- linux-azure Fixed in 5.4.0-1026.26
- linux-gcp Fixed in 5.4.0-1025.25
- linux-kvm Fixed in 5.4.0-1024.24
- linux-oem-5.6 Fixed in 5.6.0-1048.52
- linux-oracle Fixed in 5.4.0-1025.25
- linux-raspi Fixed in 5.4.0-1019.21
- linux-raspi2 No fix yet
- linux-riscv Fixed in 5.4.0-34.38
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
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 No fix yet
- linux-aws Fixed in 4.4.0-1078.82Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1098.109~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-190.220~14.04.1Available 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 4.4.0-1046.51Available 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.
Ubuntu Pro FIPS-updates 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2030.31Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2012.14Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1044.50Available 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.
Ubuntu Pro FIPS-updates 20.04 LTS
- linux-aws-fips Fixed in 5.4.0-1069.73+fips2Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.4.0-1073.76+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.4.0-1067.71~20.04.1Available 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.
Ubuntu Pro FIPS 16.04 LTS
- linux-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 18.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 20.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-gcp-fips No fix yet
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.