Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-42898

CVE-2022-42898HIGH

n/a n/a — 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 execut…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  H  H    8.8   .0647   93.7     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Oct 13  Reserved by mitre
  Dec 25  Published (CNA: mitre)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-42898. Public exploit reference added.

CWE-190 · CNA: mitre · CVSS v3.1 · 12 references · NVD status: Modified

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."

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
October 13, 2022	Reserved	Reserved by mitre
December 25, 2022	Published	Published (CNA: mitre)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-42898. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-190

References (12)

https://bugzilla.samba.org/show_bug.cgi?id=15203 [Exploit, Issue Tracking, Patch, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c [Third Party Advisory]
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 [Patch, 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.txt [Vendor Advisory]
https://www.samba.org/samba/security/CVE-2022-42898.html [Third Party Advisory]

Authoritative record: CVE-2022-42898 at cve.org

Weaknesses: CWE-190

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-42898 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.