synced 8 MIN AGO
01 Record

CVE-2021-4204

An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or

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
1.23% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 68.5% of scored records. A rank, not a probability.
NVD base score
7.1 (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:N/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
2022-08-24 00:00Z4 YR AGO
Last updated
2024-08-03 17:16Z2 YR AGO
Reserved
2022-01-11
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-20Improper Input ValidationClass
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
Data version
5.1
Document digest
267007f27bf7784fba3632469eecc7ad8ced1b691c45a0c2cbc80dda6f75d7bd

05 Affected products

VendorProductVersionsPlatforms
n/akernelAffects Linux kernel v5.8 or later—

06 References

07 Fixed in

AlmaLinux 8

  • bpftool
    Fixed in 4.18.0-553.el8_10
  • kernel
    Fixed in 4.18.0-553.el8_10
  • kernel-abi-stablelists
    Fixed in 4.18.0-553.el8_10
  • kernel-core
    Fixed in 4.18.0-553.el8_10
  • kernel-cross-headers
    Fixed in 4.18.0-553.el8_10
  • kernel-debug
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-core
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-modules-extra
    Fixed in 4.18.0-553.el8_10
  • kernel-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-doc
    Fixed in 4.18.0-553.el8_10
  • kernel-headers
    Fixed in 4.18.0-553.el8_10
  • kernel-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-modules-extra
    Fixed in 4.18.0-553.el8_10
  • kernel-rt
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-core
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-core
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-devel
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-kvm
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-modules
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-modules-extra
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-devel
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-kvm
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-modules
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-modules-extra
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-tools
    Fixed in 4.18.0-553.el8_10
  • kernel-tools-libs
    Fixed in 4.18.0-553.el8_10
  • kernel-tools-libs-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-core
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-553.el8_10
  • perf
    Fixed in 4.18.0-553.el8_10
  • python3-perf
    Fixed in 4.18.0-553.el8_10

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • bpftool
    Fixed in 4.18.0-553.el8_10
  • kernel
    Fixed in 4.18.0-553.el8_10
  • kernel-abi-stablelists
    Fixed in 4.18.0-553.el8_10
  • kernel-core
    Fixed in 4.18.0-553.el8_10
  • kernel-cross-headers
    Fixed in 4.18.0-553.el8_10
  • kernel-debug
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-core
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-debug-modules-extra
    Fixed in 4.18.0-553.el8_10
  • kernel-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-doc
    Fixed in 4.18.0-553.el8_10
  • kernel-headers
    Fixed in 4.18.0-553.el8_10
  • kernel-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-modules-extra
    Fixed in 4.18.0-553.el8_10
  • kernel-rt
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-core
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-core
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-devel
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-kvm
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-modules
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-debug-modules-extra
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-devel
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-kvm
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-modules
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-rt-modules-extra
    Fixed in 4.18.0-553.rt7.342.el8_10
  • kernel-tools
    Fixed in 4.18.0-553.el8_10
  • kernel-tools-libs
    Fixed in 4.18.0-553.el8_10
  • kernel-tools-libs-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-core
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-553.el8_10
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-553.el8_10
  • perf
    Fixed in 4.18.0-553.el8_10
  • python3-perf
    Fixed in 4.18.0-553.el8_10

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 5.17.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • linux
    Fixed in 5.17.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • linux
    Fixed in 5.17.3-1

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-aws-5.0
    No fix yet
  • linux-aws-5.3
    No fix yet
  • linux-azure
    No fix yet
  • linux-azure-5.3
    No fix yet
  • linux-azure-edge
    No fix yet
  • linux-gcp
    No fix yet
  • linux-gcp-5.3
    No fix yet
  • linux-gke-4.15
    No fix yet
  • linux-hwe
    No fix yet
  • linux-hwe-edge
    No fix yet
  • linux-oem
    No fix yet
  • linux-oracle-5.0
    No fix yet
  • linux-oracle-5.3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • linux-aws-5.11
    Fixed in 5.11.0-1025.27~20.04.1
  • linux-aws-5.13
    Fixed in 5.13.0-1011.12~20.04.1
  • linux-aws-5.8
    No fix yet
  • linux-azure-5.11
    Fixed in 5.11.0-1025.27~20.04.1
  • linux-azure-5.13
    Fixed in 5.13.0-1012.14~20.04.1
  • linux-azure-5.8
    No fix yet
  • linux-gcp-5.11
    Fixed in 5.11.0-1026.29~20.04.1
  • linux-gcp-5.13
    Fixed in 5.13.0-1012.15~20.04.1
  • linux-gcp-5.8
    No fix yet
  • linux-hwe-5.11
    Fixed in 5.11.0-46.51~20.04.1
  • linux-hwe-5.13
    Fixed in 5.13.0-25.26~20.04.1
  • linux-hwe-5.8
    No fix yet
  • linux-intel-5.13
    No fix yet
  • linux-oem-5.10
    Fixed in 5.10.0-1055.58
  • linux-oem-5.13
    Fixed in 5.13.0-1026.32
  • linux-oem-5.14
    Fixed in 5.14.0-1018.19
  • linux-oem-5.6
    No fix yet
  • linux-oracle-5.11
    Fixed in 5.11.0-1025.27~20.04.1
  • linux-oracle-5.13
    Fixed in 5.13.0-1015.19~20.04.1
  • linux-oracle-5.8
    No fix yet
  • linux-raspi2
    No fix yet
  • linux-riscv
    No fix yet
  • linux-riscv-5.11
    Fixed in 5.11.0-1026.28~20.04.1
  • 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-azure-fde-5.19
    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.