CVE-2021-33631: Kernel crash in EXT4 filesystem

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-18 · updated 2026-06-17
Weakness: CWE-190

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.

Affected products

Openatom Openeuler: from 4.19.90 before 4.19.90-2401.3; from 5.10.0-60.18.0 before 5.10.0-183.0.0 — fixed in 4.19.90-2401.3, 5.10.0-183.0.0

How to fix

Upgrade to a fixed version: Openatom Openeuler 4.19.90-2401.3, 5.10.0-183.0.0. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2024/01/30/10
http://www.openwall.com/lists/oss-security/2024/01/30/3
http://www.openwall.com/lists/oss-security/2024/01/30/4
http://www.openwall.com/lists/oss-security/2024/01/30/5
http://www.openwall.com/lists/oss-security/2024/01/30/9
http://www.openwall.com/lists/oss-security/2024/01/31/2
http://www.openwall.com/lists/oss-security/2024/01/31/3
http://www.openwall.com/lists/oss-security/2024/02/02/6
http://www.openwall.com/lists/oss-security/2024/02/02/9
http://www.openwall.com/lists/oss-security/2024/02/03/1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c099c4fdc438014d5893629e70a8ba934433ee8
https://gitee.com/src-openeuler/kernel/pulls/1389

Get alerted when CVE-2021-33631 or the next vulnerability affects your stack