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Vulnerability record · CVE-2022-42898 · published 25 December 2022

CVE-2022-42898: Mit kerberos 5 integer overflow vulnerability

Mit · Kerberos 5

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."

8.8 CVSS 3.1 High EPSS 6.2% · top 6.7% CWE-190 · Integer overflow
8.8CVSS 3.1 base score
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
22References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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."

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.samba.org/show_bug.cgi?id=15203 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c Third Party Advisory
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 PatchThird 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 NotesVendor Advisory
https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
https://www.samba.org/samba/security/CVE-2022-42898.html Third Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=15203 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c Third Party Advisory
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 PatchThird 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 NotesVendor Advisory
https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
https://www.samba.org/samba/security/CVE-2022-42898.html Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-42898), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.