What is CVE-2021-33631?

CVE-2021-33631 is a medium-severity vulnerability in Openatom Openeuler, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2024-01-18.

How severe is CVE-2021-33631?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-33631 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Openatom Openeuler

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.

Vulnerability class: Integer Overflow

Published 2024-01-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Openatom Openeuler
Openeuler Kernel — versions 4.19.90, 5.10.0-60.18.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
gitee.com/src-openeuler/kernel/pulls/1389 (Release Notes)
gitee.com/src-openeuler/kernel/pulls/1396 (Release Notes)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch)
www.openwall.com/lists/oss-security/2024/01/30/3

Frequently asked questions

What is CVE-2021-33631?: CVE-2021-33631 is a medium-severity vulnerability in Openatom Openeuler, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2024-01-18.
How severe is CVE-2021-33631?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-33631 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.