# CVE-2022-42898: Integer overflow in n/a

> Integer overflow in MIT Kerberos PAC parsing allows remote code execution on 32-bit systems and denial of service on others.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Dec 2022
- **Updated:** 14 Oct 2026
- **Also known as:** ALPINE-CVE-2022-42898, ALSA-2022:8637, ALSA-2022:8638, AZL-12123, AZL-12133, AZL-37017, CLEANSTART-2024-AC14298, CLSA-2022-1670873922, CLSA-2022-1670874026, CLSA-2022-1670874138, CLSA-2022-1670874451, CLSA-2023-1673905845, CLSA-2023-1674203970, CLSA-2025-1762337525, DEBIAN-CVE-2022-42898, DLA-3213-1, DSA-5286-1, ECHO-ef27-1be4-276e, GHSA-64mq-fvfj-5x3c, JLSEC-2026-91, MGASA-2022-0467, OESA-2022-2121, RHEA-2023:3850, RHSA-2022:8637, RHSA-2022:8638, RHSA-2022:8639, RHSA-2022:8640, RHSA-2022:8641, RHSA-2022:8648, RHSA-2022:8662, RHSA-2022:8663, RHSA-2022:8669, RHSA-2022:9029, RLSA-2022:8637, RLSA-2022:8638, SUSE-SU-2022:4153-1, SUSE-SU-2022:4155-1, SUSE-SU-2022:4167-1, SUSE-SU-2022:4335-1, SUSE-SU-2023:0198-1, UBUNTU-CVE-2022-42898, openSUSE-SU-2024:12524-1, openSUSE-SU-2024:12525-1

## What is CVE-2022-42898?

CVE-2022-42898 is a high-severity vulnerability in Mit Kerberos 5, published on 25 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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."

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2022-42898?

It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `krb5-devel` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-libs` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-pkinit` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-server` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-server-ldap` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-workstation` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `libkadm5` | AlmaLinux:8 | All versions | 1.18.2-22.el8_7 |
| `krb5-devel` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5-libs` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5-pkinit` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5-server` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5-server-ldap` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5-workstation` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `libkadm5` | AlmaLinux:9 | All versions | 1.19.1-24.el9_1 |
| `krb5` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-libs` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-pkinit` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server-ldap` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-workstation` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `libkadm5` | Red Hat:enterprise_linux:7::client | All versions | 0:1.15.1-55.el7_9 |
| `krb5-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.15.1-55.el7_9 |
| `krb5-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server-ldap` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.15.1-55.el7_9 |
| `krb5` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-libs` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-pkinit` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-server-ldap` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5-workstation` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `libkadm5` | Red Hat:enterprise_linux:7::server | All versions | 0:1.15.1-55.el7_9 |
| `krb5` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.15.1-55.el7_9 |
| `krb5-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.15.1-55.el7_9 |
| `krb5-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.15.1-55.el7_9 |
| `krb5-libs` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.15.1-55.el7_9 |

Products: Heimdal Project Heimdal, Mit Kerberos 5, Samba Samba.

## How do I fix CVE-2022-42898?

Upgrade to a fixed version.

## Is CVE-2022-42898 being exploited?

There is no known exploitation of CVE-2022-42898 in the wild and no public exploit code.

## Other vulnerabilities in Mit Kerberos 5

- [CVE-2022-44640](https://insights.sbomify.com/CVE-2022-44640/): Use after free in n/a (critical 9.8)
- [CVE-2022-3116](https://insights.sbomify.com/CVE-2022-3116/): Null dereference in Heimdal Software Kerberos (high 7.5)
- [CVE-2022-45142](https://insights.sbomify.com/CVE-2022-45142/): Security feature bypass in Samba (high 7.5)
- [CVE-2021-44758](https://insights.sbomify.com/CVE-2021-44758/): Null dereference in n/a (high 7.5)
- [CVE-2018-16860](https://insights.sbomify.com/CVE-2018-16860/): Auth bypass in samba (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-42898 and fix it if it is affected.

What it is: CVE-2022-42898 is a high-severity vulnerability in Mit Kerberos 5, published on 25 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-42898 in the wild and no public exploit code.

Affected product: Mit Kerberos 5. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-42898/ (Markdown: https://insights.sbomify.com/CVE-2022-42898/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-42898
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-42898
- OSV: https://osv.dev/vulnerability/CVE-2022-42898

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-42898/
Summaries are generated and may contain mistakes; the official description above is the record.