CVE-2021-27365
An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user
02 Description
An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user
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
- 2.09% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 81.3% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (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:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-07-30.
- Red Hat severity
- Important. 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 04:22Z5 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
- Data version
- 5.1
- Document digest
- 2f55c031467fd76c5601b02fed7bab5e45a145e0bdac23b97a642b24e86cd38f
05 Affected products
06 References
- lists.debian.org[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.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
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.html
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2021/03/06/1
- blog.grimm-co.comhttps://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.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/
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1182715
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5
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 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.