# CVE-2025-61912: python3-ldap: python-ldap is a lightweight directory access protocol (LDAP) client APIfor Python CVE-2025-61912 is fixed in 4 products on 1 platform, first by python-ldap 3.0.0-1ubuntu0.2+esm1, released October 10, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-61912 - Priority: Routine - CVSS: 5.3 (Medium) - EPSS: 0.0046 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 10, 2025 ## Description python-ldap is a lightweight directory access protocol (LDAP) client APIfor Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes\x00 incorrectly by emitting a backslash followed by a literal NUL byteinstead of the RFC-4514 hex form \00. Any application that uses this helperto construct DNs from untrusted input can be made to consistently failbefore a request is sent to the LDAP server (e.g., AD), resulting in aclient-side denial of service. Version 3.4.5 contains a patch for theissue. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | python-ldap Debian 12.15 (bookworm) | 3.4.3-2+deb12u1 | [DEBIAN-CVE-2025-61912](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61912.md) | Oct 10, 2025 | | Linux | python-ldap Debian 13.5 (trixie) | 3.4.4-1+deb13u1 | [DEBIAN-CVE-2025-61912](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61912.md) | Oct 10, 2025 | | Linux | python-ldap Debian 14 | 3.4.5-1 | [DEBIAN-CVE-2025-61912](https://patchblox.com/security/data/fix/linux/debian-cve-2025-61912.md) | Oct 10, 2025 | | Linux | python-ldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python-ldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-ldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python-ldap opensuse-leap 15.6 | 3.4.0-150400.3.3.1 | [SUSE-SU-2025:3714-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-3714-1.md) | Oct 22, 2025 | | Linux | python-ldap opensuse-leap 16.0 | 3.4.4-160000.3.1 | [OPENSUSE-SU-2026:20421-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20421-1.md) | Mar 25, 2026 | | Linux | python-ldap sles 15.6 | 3.4.0-150400.3.3.1 | [SUSE-SU-2025:3714-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-3714-1.md) | Oct 22, 2025 | | Linux | python-ldap sles 16.0 | 3.4.4-160000.3.1 | [SUSE-SU-2026:20933-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20933-1.md) | Mar 25, 2026 | | Linux | python-pyldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python-pyldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-pyldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python3-ldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-ldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 20.04 LTS (focal) | 3.2.0-4ubuntu2.1+esm1 | [python3-ldap 3.2.0-4ubuntu2.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-ldap-3.2.0-4ubuntu2.1-esm1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 22.04.1 LTS (jammy) | 3.2.0-4ubuntu7.2 | [python3-ldap 3.2.0-4ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-ldap-3.2.0-4ubuntu7.2.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 24.04.5 LTS (noble) | 3.4.4-1ubuntu0.24.04.1 | [python3-ldap 3.4.4-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-ldap-3.4.4-1ubuntu0.24.04.1.md) | Oct 10, 2025 | | Linux | python3-ldap Ubuntu 25.04 (plucky) | 3.4.4-1ubuntu0.25.04.1 | [python3-ldap 3.4.4-1ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-ldap-3.4.4-1ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | python3-ldap Ubuntu 25.10 (questing) | 3.4.4-1ubuntu0.25.10.1 | [python3-ldap 3.4.4-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-ldap-3.4.4-1ubuntu0.25.10.1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 18.04.6 LTS (bionic) | 3.0.0-1ubuntu0.2+esm1 | [python3-pyldap 3.0.0-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-pyldap-3.0.0-1ubuntu0.2-esm1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 20.04 LTS (focal) | 3.2.0-4ubuntu2.1+esm1 | [python3-pyldap 3.2.0-4ubuntu2.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-pyldap-3.2.0-4ubuntu2.1-esm1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 22.04.1 LTS (jammy) | 3.2.0-4ubuntu7.2 | [python3-pyldap 3.2.0-4ubuntu7.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-pyldap-3.2.0-4ubuntu7.2.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 24.04.5 LTS (noble) | 3.4.4-1ubuntu0.24.04.1 | [python3-pyldap 3.4.4-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-pyldap-3.4.4-1ubuntu0.24.04.1.md) | Oct 10, 2025 | | Linux | python3-pyldap Ubuntu 25.04 (plucky) | 3.4.4-1ubuntu0.25.04.1 | [python3-pyldap 3.4.4-1ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-pyldap-3.4.4-1ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | python3-pyldap Ubuntu 25.10 (questing) | 3.4.4-1ubuntu0.25.10.1 | [python3-pyldap 3.4.4-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-pyldap-3.4.4-1ubuntu0.25.10.1.md) | Oct 10, 2025 | --- Data as of 2026-11-10T01:44:33Z UTC. 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