# CVE-2023-39975: krb5-devel: Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecu...

CVE-2023-39975 is fixed in 16 products on 1 platform, first by ALAS2023-2023-321, released August 31, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-39975
- Priority: High
- CVSS: 8.8 (Moderate)
- EPSS: 0.0147
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 31, 2023

## Description

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).  Security Fix(es):  * krb5: Denial of service through freeing uninitialized pointer (CVE-2023-36054)  * krb5: double-free in KDC TGS processing (CVE-2023-39975)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | krb5 rocky 9 | 0:1.21.1-10.el9_8 | [RLSA-2023:6699](https://patchblox.com/security/data/fix/linux/rlsa-2023-6699.md) | May 28, 2026 |
| Linux | krb5-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-debugsource amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-devel RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-devel almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-devel amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-devel ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-libs RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-libs almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-libs amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-libs ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-libs-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-pkinit RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-pkinit almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-pkinit amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-pkinit ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-pkinit-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-server RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-server almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-server amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-server ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-server-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-server-ldap RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-server-ldap almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-server-ldap amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-server-ldap ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-server-ldap-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-workstation RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-workstation almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | krb5-workstation amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | krb5-workstation ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | krb5-workstation-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | libkadm5 RHEL 9 | 0:1.21.1-1.el9 | [RHSA-2023:6699](https://patchblox.com/security/data/fix/linux/rhsa-2023-6699.md) | Nov 7, 2023 |
| Linux | libkadm5 almalinux 9 | 1.21.1-1.el9 | [ALSA-2023:6699](https://patchblox.com/security/data/fix/linux/alsa-2023-6699.md) | Nov 7, 2023 |
| Linux | libkadm5 amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |
| Linux | libkadm5 ol 9 | 0:1.21.1-1.0.1.el9 | [ELSA-2023-6699](https://patchblox.com/security/data/fix/linux/elsa-2023-6699.md) | Nov 11, 2023 |
| Linux | libkadm5-debuginfo amzn 2023 | 1.21-3.amzn2023.0.3 | [ALAS2023-2023-321](https://patchblox.com/security/data/fix/linux/alas2023-2023-321.md) | Aug 31, 2023 |

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