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01 Record

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)

HighPUBLISHEDCNA: mitre
CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 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)

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
6.85% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 93.9% of scored records. A rank, not a probability.
NVD base score
8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-14.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-12-25 00:00Z3 YR AGO
Last updated
2026-10-14 18:26Z14 DAYS AGO
Reserved
2022-10-13
Assigning CNA
mitre
Record state
PUBLISHED
Severity
High (CVSS 8.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-190Integer Overflow or WraparoundBase
Data version
5.2
Document digest
7e07c2cc467431e6234ea56337654eb5754987def4241b962d71762ecc10dece

05 Affected products

VendorProductVersionsPlatforms
heimdal_projectheimdalNot specified—
mitkerberos_5Not specified—
redhatenterprise_linuxNot specified—
redhatrhel_ausNot specified—
redhatrhel_e4sNot specified—
redhatrhel_elsNot specified—
redhatrhel_eusNot specified—
redhatrhel_tusNot specified—
redhatrhev_hypervisorNot specified—
redhatstorageNot specified—
sambasambaNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • krb5-devel
    Fixed in 1.18.2-22.el8_7
  • krb5-libs
    Fixed in 1.18.2-22.el8_7
  • krb5-pkinit
    Fixed in 1.18.2-22.el8_7
  • krb5-server
    Fixed in 1.18.2-22.el8_7
  • krb5-server-ldap
    Fixed in 1.18.2-22.el8_7
  • krb5-workstation
    Fixed in 1.18.2-22.el8_7
  • libkadm5
    Fixed in 1.18.2-22.el8_7

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • krb5-devel
    Fixed in 1.19.1-24.el9_1
  • krb5-libs
    Fixed in 1.19.1-24.el9_1
  • krb5-pkinit
    Fixed in 1.19.1-24.el9_1
  • krb5-server
    Fixed in 1.19.1-24.el9_1
  • krb5-server-ldap
    Fixed in 1.19.1-24.el9_1
  • krb5-workstation
    Fixed in 1.19.1-24.el9_1
  • libkadm5
    Fixed in 1.19.1-24.el9_1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • samba
    Fixed in 4.17.5-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • krb5-devel
    Fixed in 1.18.2-22.el8_7
  • krb5-libs
    Fixed in 1.18.2-22.el8_7
  • krb5-pkinit
    Fixed in 1.18.2-22.el8_7
  • krb5-server
    Fixed in 1.18.2-22.el8_7
  • krb5-server-ldap
    Fixed in 1.18.2-22.el8_7
  • krb5-workstation
    Fixed in 1.18.2-22.el8_7
  • libkadm5
    Fixed in 1.18.2-22.el8_7

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • krb5-devel
    Fixed in 1.19.1-24.el9_1
  • krb5-libs
    Fixed in 1.19.1-24.el9_1
  • krb5-pkinit
    Fixed in 1.19.1-24.el9_1
  • krb5-server
    Fixed in 1.19.1-24.el9_1
  • krb5-server-ldap
    Fixed in 1.19.1-24.el9_1
  • krb5-workstation
    Fixed in 1.19.1-24.el9_1
  • libkadm5
    Fixed in 1.19.1-24.el9_1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • heimdal
    Fixed in 7.8.git20221115.a6cf945+dfsg-1
  • krb5
    Fixed in 1.20.1-1
  • samba
    Fixed in 2:4.17.3+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • heimdal
    Fixed in 7.8.git20221115.a6cf945+dfsg-1
  • krb5
    Fixed in 1.20.1-1
  • samba
    Fixed in 2:4.17.3+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • heimdal
    Fixed in 7.8.git20221115.a6cf945+dfsg-1
  • krb5
    Fixed in 1.20.1-1
  • samba
    Fixed in 2:4.17.3+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • heimdal
    Fixed in 7.5.0+dfsg-1ubuntu0.3
  • krb5
    Fixed in 1.16-2ubuntu0.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • heimdal
    Fixed in 7.7.0+dfsg-1ubuntu1.3
  • krb5
    Fixed in 1.17-6ubuntu4.2
  • samba
    Fixed in 2:4.15.13+dfsg-0ubuntu0.20.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • heimdal
    No fix yet
  • krb5
    Fixed in 1.19.2-2ubuntu0.1
  • samba
    Fixed in 2:4.15.13+dfsg-0ubuntu1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • heimdal
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • heimdal
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • heimdal
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • heimdal
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • heimdal
    Fixed in 1.6~git20131207+dfsg-1ubuntu1.2+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • krb5
    Fixed in 1.12+dfsg-2ubuntu5.4+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • samba
    Fixed in 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • heimdal
    Fixed in 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • krb5
    Fixed in 1.13.2+dfsg-5ubuntu2.2+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • samba
    Fixed in 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • samba
    Fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.