What is CVE-2021-29801?

CVE-2021-29801 is a high-severity vulnerability in IBM Aix. CVSS score: 7.8/10. Published 2021-08-26.

How severe is CVE-2021-29801?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in IBM Aix

CVE-2021-29801

IBM AIX 7.1, 7.2, and VIOS 3.1 could allow a non-privileged local user to exploit a vulnerability in the kernel to gain root privileges. IBM X-Force ID: 203977.

Published 2021-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (16.3th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

IBM Aix — versions 7.1, 7.2
IBM Vios — versions 3.1

References

www.ibm.com/support/pages/node/6483875 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/203977 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-29801?: CVE-2021-29801 is a high-severity vulnerability in IBM Aix. CVSS score: 7.8/10. Published 2021-08-26.
How severe is CVE-2021-29801?: High severity. CVSS v3 base score is 7.8 out of 10.