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No exploitation reportedFix available

CVE-2021-33631

No exploitation reported by the sources we read.

  • Published2024-01-18
  • Fixed in5.10.0-183.0.0 · 4.19.90-2401.3
  • WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Integer Overflow or Wraparound vulnerability in openEuler kernel on Linux (filesystem modules) allows Forced Integer Overflow.This issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3, from 5.10.0-60.18.0 before 5.10.0-183.0.0.

Timeline

dates in UTC
  1. 2024-01-1815:15CVE publishedNVD

Versions per branch

NVD
Openatom openeuler
BranchAffectedFixed in
5.10≥ 5.10.0-60.18.0, < 5.10.0-183.0.05.10.0-183.0.0
4.19≥ 4.19.90, < 4.19.90-2401.34.19.90-2401.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As openEuler, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • openEuler kernelother versions: not affected

    package kernelhttps://gitee.com/src-openeulerplatforms: Linux

    Affected
    • ≥ 4.19.90, < 4.19.90-2401.3fixed in 4.19.90-2401.3git
    • ≥ 5.10.0-60.18.0, < 5.10.0-183.0.0fixed in 5.10.0-183.0.0git

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-02-03

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bpftoolRed Hat:enterprise_linux:9::baseosall versions · fixed in 0:7.0.0-284.11.1.el9_2and 1 other package
  • bpftool-debuginfoRed Hat:enterprise_linux:9::crball versions · fixed in 0:7.0.0-284.11.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::appstreamall versions · fixed in 0:7.0.0-284.11.1.el9_2
  • dtb-aarch64openSUSE:Leap 15.5all versions · fixed in 5.14.21-150500.55.49.1and 10 other packages
  • kernelTuxCare:CentOS:8.5all versions · fixed in 4.18.0-348.7.1.el8_5.tuxcare.els18and 21 other packages
  • kernelTuxCare:CentOS:8.4all versions · fixed in 4.18.0-305.25.1.el8_4.tuxcare.els18and 21 other packages
  • kernelRocky Linux:8all versions · fixed in 0:4.18.0-513.24.1.el8_9
  • kernelRocky Linux:8all versions · fixed in 0:4.18.0-513.24.1.el8_9.cloud.0.1

192 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2024:2093 Red Hat Product Security63 products fixed

    Red Hat Security Advisory: security update Logging for Red Hat OpenShift - 5.7.13

  • RHSA-2024:2621 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2024:1614 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2024:1607 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2023:2458 Red Hat Product Security201 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2023:2148 Red Hat Product Security34 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

Full record on NVD

Fix

  1. Update Openatom openeuler to 5.10.0-183.0.0 · 4.19.90-2401.3
  2. Vendor fix Red Hat Product Security RHSA-2024:2093 · 63 productsFor OpenShift Container Platform 4.11 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.openshift.com/container-platform/4.12/release_notes/ocp-4-12-release-not…
  3. Vendor fix Red Hat Product Security RHSA-2024:2621 · 120 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  4. Vendor fix Red Hat Product Security RHSA-2023:2148 · 34 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  5. Workaround from the vendor Red Hat Product Security RHSA-2024:2093 · 63 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2024-02-21
  • CNACVSS 3.15.5known since 2026-10-23
  • NVDCVSS 3.17.8read 2026-10-23
  • CNAweakness (CWE)CWE-190known since 2026-10-23
  • NVDweakness (CWE)CWE-190read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2024-01-18
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-ff22-5jp8-224r

Frequently asked questions

What is CVE-2021-33631?

Integer Overflow or Wraparound vulnerability in openEuler kernel on Linux (filesystem modules) allows Forced Integer Overflow.This issue affects openEuler kernel: from 4.19.90 before 4.19.90-2401.3, from 5.10.0-60.18.0 before 5.10.0-183.0.0.

Is CVE-2021-33631 actively exploited?

Active exploitation of CVE-2021-33631 has not been confirmed. Its EPSS score was 0.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-33631?

CVE-2021-33631 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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