What is CVE-2022-2031?

CVE-2022-2031 is a high-severity vulnerability in Samba, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.8/10. Published 2022-08-25.

How severe is CVE-2022-2031?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Samba

CVE-2022-2031

A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.

Published 2022-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.001

Affected products

Samba
Samba — versions Versions prior to samba 4.16.4, samba 4.15.9, samba 4.14.14

Weakness classification (CWE)

References

www.samba.org/samba/security/CVE-2022-2031.html (Vendor Advisory)
security.gentoo.org/glsa/202309-06 (vendor-advisory)

Frequently asked questions

What is CVE-2022-2031?: CVE-2022-2031 is a high-severity vulnerability in Samba, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.8/10. Published 2022-08-25.
How severe is CVE-2022-2031?: High severity. CVSS v3 base score is 8.8 out of 10.