CVE-2022-42898

Name: CVE-2022-42898
Creator: NVD / NIST
Published: 2022-12-25T06:15:09.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 6.42%

Last modified Jun 17, 2026

CVE-2022-42898 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. EPSS estimates a 6.42% chance of exploitation in the next 30 days.

Description

PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

6.42%

92.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mit	Kerberos 5	>= 1.8, < 1.19.4
Mit	Kerberos 5	1.20
Heimdal Project	Heimdal	< 7.7.1
Samba	Samba	< 4.15.12
Samba	Samba	>= 4.16.0, < 4.16.7
Samba	Samba	>= 4.17.0, < 4.17.3

References

https://bugzilla.samba.org/show_bug.cgi?id=15203Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cThird Party Advisory
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583Patch, Third Party Advisory
https://security.gentoo.org/glsa/202309-06
https://security.gentoo.org/glsa/202310-06
https://security.netapp.com/advisory/ntap-20230216-0008/
https://security.netapp.com/advisory/ntap-20230223-0001/
https://web.mit.edu/kerberos/advisories/Vendor Advisory
https://web.mit.edu/kerberos/krb5-1.19/Release Notes, Vendor Advisory
https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txtVendor Advisory
https://www.samba.org/samba/security/CVE-2022-42898.htmlThird Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=15203Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cThird Party Advisory
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583Patch, Third Party Advisory
https://security.gentoo.org/glsa/202309-06
https://security.gentoo.org/glsa/202310-06
https://security.netapp.com/advisory/ntap-20230216-0008/
https://security.netapp.com/advisory/ntap-20230223-0001/
https://web.mit.edu/kerberos/advisories/Vendor Advisory
https://web.mit.edu/kerberos/krb5-1.19/Release Notes, Vendor Advisory
https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txtVendor Advisory
https://www.samba.org/samba/security/CVE-2022-42898.htmlThird Party Advisory

Timeline

Published: Dec 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-42898?

How severe is CVE-2022-42898?

CVE-2022-42898 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 6.42% probability of exploitation in the next 30 days.

How do I fix CVE-2022-42898?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-42898?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST