CVE-2021-3759
A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw
02 Description
A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw
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
- 0.36% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 29.9% 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 2026-10-14.
- 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
- 2022-08-23 00:00Z4 YR AGO
- Last updated
- 2026-10-14 09:49Z15 DAYS AGO
- Reserved
- 2021-09-01
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.2
- Document digest
- e529e138c5fc7bf95c15b42cc5feeea06f38ebef83a01f6703dea7d68ba20ec5
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1999675
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3759
- lore.kernel.orghttps://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive%40gmail.com/
- lists.debian.org[debian-lts-announce] 20221222 [SECURITY] [DLA 3244-1] linux-5.10 security updatehttps://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-794697.html
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-372.9.1.el8
- kernel Fixed in 4.18.0-372.9.1.el8
- kernel-abi-stablelists Fixed in 4.18.0-372.9.1.el8
- kernel-core Fixed in 4.18.0-372.9.1.el8
- kernel-cross-headers Fixed in 4.18.0-372.9.1.el8
- kernel-debug Fixed in 4.18.0-372.9.1.el8
- kernel-debug-core Fixed in 4.18.0-372.9.1.el8
- kernel-debug-devel Fixed in 4.18.0-372.9.1.el8
- kernel-debug-modules Fixed in 4.18.0-372.9.1.el8
- kernel-debug-modules-extra Fixed in 4.18.0-372.9.1.el8
- kernel-devel Fixed in 4.18.0-372.9.1.el8
- kernel-doc Fixed in 4.18.0-372.9.1.el8
- kernel-headers Fixed in 4.18.0-372.9.1.el8
- kernel-modules Fixed in 4.18.0-372.9.1.el8
- kernel-modules-extra Fixed in 4.18.0-372.9.1.el8
- kernel-tools Fixed in 4.18.0-372.9.1.el8
- kernel-tools-libs Fixed in 4.18.0-372.9.1.el8
- kernel-tools-libs-devel Fixed in 4.18.0-372.9.1.el8
- perf Fixed in 4.18.0-372.9.1.el8
- python3-perf Fixed in 4.18.0-372.9.1.el8
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 5.15.arch1-1
- linux-hardened Fixed in 5.15.5.hardened1-1
- linux-lts Fixed in 5.15.2-1
- linux-zen Fixed in 5.15.zen1-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-372.9.1.el8
- kernel Fixed in 4.18.0-372.9.1.el8
- kernel-abi-stablelists Fixed in 4.18.0-372.9.1.el8
- kernel-core Fixed in 4.18.0-372.9.1.el8
- kernel-cross-headers Fixed in 4.18.0-372.9.1.el8
- kernel-debug Fixed in 4.18.0-372.9.1.el8
- kernel-debug-core Fixed in 4.18.0-372.9.1.el8
- kernel-debug-devel Fixed in 4.18.0-372.9.1.el8
- kernel-debug-modules Fixed in 4.18.0-372.9.1.el8
- kernel-debug-modules-extra Fixed in 4.18.0-372.9.1.el8
- kernel-devel Fixed in 4.18.0-372.9.1.el8
- kernel-doc Fixed in 4.18.0-372.9.1.el8
- kernel-headers Fixed in 4.18.0-372.9.1.el8
- kernel-modules Fixed in 4.18.0-372.9.1.el8
- kernel-modules-extra Fixed in 4.18.0-372.9.1.el8
- kernel-tools Fixed in 4.18.0-372.9.1.el8
- kernel-tools-libs Fixed in 4.18.0-372.9.1.el8
- kernel-tools-libs-devel Fixed in 4.18.0-372.9.1.el8
- perf Fixed in 4.18.0-372.9.1.el8
- python3-perf Fixed in 4.18.0-372.9.1.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 5.15.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.15.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.15.3-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
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 4.15.0-162.170
- linux-aws Fixed in 4.15.0-1115.122
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1059.62~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1126.139
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1063.66~18.04.1
- linux-azure-edge No fix yet
- linux-dell300x Fixed in 4.15.0-1030.35
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1111.125
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1057.61~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 Fixed in 5.4.0-1055.58~18.04.1
- linux-gkeop-5.4 Fixed in 5.4.0-1026.27~18.04.1
- linux-hwe No fix yet
- linux-hwe-5.4 Fixed in 5.4.0-90.101~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1102.104
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1083.91
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1057.61~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1046.50~18.04.1
- linux-raspi2 Fixed in 4.15.0-1098.104
- linux-snapdragon Fixed in 4.15.0-1115.124
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 5.4.0-90.101
- linux-aws Fixed in 5.4.0-1059.62
- linux-aws-5.11 Fixed in 5.11.0-1021.22~20.04.2
- linux-aws-5.8 No fix yet
- linux-azure Fixed in 5.4.0-1063.66
- linux-azure-5.11 Fixed in 5.11.0-1021.22~20.04.1
- linux-azure-5.8 Fixed in 5.8.0-1043.46~20.04.1
- linux-bluefield Fixed in 5.4.0-1021.24
- linux-gcp Fixed in 5.4.0-1057.61
- linux-gcp-5.11 Fixed in 5.11.0-1022.24~20.04.1
- linux-gcp-5.8 No fix yet
- linux-gke Fixed in 5.4.0-1055.58
- linux-gkeop Fixed in 5.4.0-1026.27
- linux-hwe-5.11 Fixed in 5.11.0-40.44~20.04.2
- linux-hwe-5.8 No fix yet
- linux-ibm Fixed in 5.4.0-1007.8
- linux-intel-5.13 No fix yet
- linux-kvm Fixed in 5.4.0-1049.51
- linux-oem-5.10 Fixed in 5.10.0-1050.52
- linux-oem-5.13 Fixed in 5.13.0-1017.21
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle Fixed in 5.4.0-1057.61
- linux-oracle-5.11 Fixed in 5.11.0-1021.22~20.04.1
- linux-oracle-5.8 No fix yet
- linux-raspi Fixed in 5.4.0-1046.50
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 Fixed in 5.11.0-1022.23~20.04.1
- linux-riscv-5.8 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
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-azure Fixed in 4.15.0-1126.139~14.04.1Available 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 16.04 LTS
- linux-aws-hwe Fixed in 4.15.0-1115.122~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1126.139~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp Fixed in 4.15.0-1111.125~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe Fixed in 4.15.0-162.170~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle Fixed in 4.15.0-1083.91~16.04.1Available 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 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2056.58Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2038.42Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1072.81Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 4.15.0-2021.23Available 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-fips Fixed in 5.4.0-1036.42Available 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 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-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.