CVE-2021-27363
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the
02 Description
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the
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
- 0.71% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 53.0% of scored records. A rank, not a probability.
- NVD base score
- 4.4 (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:L/I:N/A:L
- 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
- 2021-03-07 03:55Z5 YR AGO
- Last updated
- 2024-08-03 20:48Z2 YR AGO
- Reserved
- 2021-02-17
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
- Data version
- 5.1
- Document digest
- 3b2dd960027d90c30cdff893cc8db434c1c2f11d968992dc8b4f52ae68bc5468
05 Affected products
06 References
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2021/03/06/1
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1182716
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa
- lists.debian.org[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- blog.grimm-co.comhttps://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html
- lists.debian.org[debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
- packetstormsecurity.comhttp://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20210409-0001/
07 Fixed in
AlmaLinux 8
- kernel-abi-whitelists Fixed in 4.18.0-240.22.1.el8_3
- kernel-tools-libs-devel Fixed in 4.18.0-240.22.1.el8_3
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- linux Fixed in 5.11.4.arch1-1
- linux-hardened Fixed in 5.10.21.hardened1-1
- linux-lts Fixed in 5.10.21-1
- linux-zen Fixed in 5.11.4.zen1-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- kernel-abi-whitelists Fixed in 4.18.0-240.22.1.el8_3
- kernel-tools-libs-devel Fixed in 4.18.0-240.22.1.el8_3
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 5.10.24-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.10.24-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.10.24-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-206.238
- linux-aws Fixed in 4.4.0-1124.138
- linux-aws-hwe Fixed in 4.15.0-1096.103~16.04.1
- linux-azure Fixed in 4.15.0-1110.122~16.04.1
- linux-gcp Fixed in 4.15.0-1095.108~16.04.1
- linux-hwe Fixed in 4.15.0-139.143~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1090.99
- linux-oracle Fixed in 4.15.0-1067.75~16.04.1
- linux-raspi2 Fixed in 4.4.0-1148.158
- linux-snapdragon Fixed in 4.4.0-1152.162
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 4.15.0-139.143
- linux-aws Fixed in 4.15.0-1096.103
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1041.43~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1110.122
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1043.45~18.04.1
- linux-azure-edge No fix yet
- linux-dell300x Fixed in 4.15.0-1015.19
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1095.108
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1040.43~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.3 Fixed in 5.3.0-1041.44
- linux-gke-5.4 Fixed in 5.4.0-1039.41~18.04.1
- linux-gkeop-5.4 Fixed in 5.4.0-1012.13~18.04.1
- linux-hwe Fixed in 5.3.0-72.68
- linux-hwe-5.4 Fixed in 5.4.0-70.78~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1087.89
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1067.75
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1041.44~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1032.35~18.04.1
- linux-raspi2 Fixed in 4.15.0-1081.86
- linux-raspi2-5.3 Fixed in 5.3.0-1038.40
- linux-snapdragon Fixed in 4.15.0-1098.107
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 5.4.0-70.78
- linux-aws Fixed in 5.4.0-1041.43
- linux-azure Fixed in 5.4.0-1043.45
- linux-gcp Fixed in 5.4.0-1040.43
- linux-gke Fixed in 5.4.0-1039.41
- linux-gkeop Fixed in 5.4.0-1012.13
- linux-hwe-5.8 Fixed in 5.8.0-48.54~20.04.1
- linux-kvm Fixed in 5.4.0-1036.37
- linux-oem-5.10 Fixed in 5.10.0-1019.20
- linux-oem-5.6 Fixed in 5.6.0-1052.56
- linux-oracle Fixed in 5.4.0-1041.44
- linux-raspi Fixed in 5.4.0-1032.35
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.8 Fixed in 5.8.0-20.22~20.04.1
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 Fixed in 3.13.0-185.236Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-aws Fixed in 4.4.0-1088.92Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1110.122~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-206.238~14.04.1Available 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 20.04 LTS
- linux-azure-fde-5.15 Fixed in 5.15.0-1114.123~20.04.1Available 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 4.4.0-1058.64Available 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 4.15.0-2039.41Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2022.25Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1055.63Available 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.