CVE-2022-42898

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

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

6.9% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-25)

CWE

CWE-190

Published

2022-12-25

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• heimdal_project:heimdal
• mit:kerberos_5
• samba:samba

References

• https://bugzilla.samba.org/show_bug.cgi?id=15203
• https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
• https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
• https://security.gentoo.org/glsa/202309-06
• https://security.gentoo.org/glsa/202310-06

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