# CVE-2020-35512: dbus: A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, a...

CVE-2020-35512 is fixed in 5 products on 1 platform, first by dbus 1.12.2-1ubuntu1.3, released February 15, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-35512
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 15, 2021

## Description

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dbus Ubuntu 18.04.6 LTS (bionic) | 1.12.2-1ubuntu1.3 | [dbus 1.12.2-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dbus-1.12.2-1ubuntu1.3.md) | Feb 15, 2021 |
| Linux | dbus Ubuntu 20.04 LTS (focal) | 1.12.16-2ubuntu2.2 | [dbus 1.12.16-2ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dbus-1.12.16-2ubuntu2.2.md) | Feb 15, 2021 |
| Linux | dbus-tests Ubuntu 18.04.6 LTS (bionic) | 1.12.2-1ubuntu1.3 | [dbus-tests 1.12.2-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dbus-tests-1.12.2-1ubuntu1.3.md) | Feb 15, 2021 |
| Linux | dbus-tests Ubuntu 20.04 LTS (focal) | 1.12.16-2ubuntu2.2 | [dbus-tests 1.12.16-2ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dbus-tests-1.12.16-2ubuntu2.2.md) | Feb 15, 2021 |
| Linux | dbus-user-session Ubuntu 18.04.6 LTS (bionic) | 1.12.2-1ubuntu1.3 | [dbus-user-session 1.12.2-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dbus-user-session-1.12.2-1ubuntu1.3.md) | Feb 15, 2021 |
| Linux | dbus-user-session Ubuntu 20.04 LTS (focal) | 1.12.16-2ubuntu2.2 | [dbus-user-session 1.12.16-2ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dbus-user-session-1.12.16-2ubuntu2.2.md) | Feb 15, 2021 |
| Linux | dbus-x11 Ubuntu 18.04.6 LTS (bionic) | 1.12.2-1ubuntu1.3 | [dbus-x11 1.12.2-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dbus-x11-1.12.2-1ubuntu1.3.md) | Feb 15, 2021 |
| Linux | dbus-x11 Ubuntu 20.04 LTS (focal) | 1.12.16-2ubuntu2.2 | [dbus-x11 1.12.16-2ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dbus-x11-1.12.16-2ubuntu2.2.md) | Feb 15, 2021 |
| Linux | libdbus-1-3 Ubuntu 18.04.6 LTS (bionic) | 1.12.2-1ubuntu1.3 | [libdbus-1-3 1.12.2-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libdbus-1-3-1.12.2-1ubuntu1.3.md) | Feb 15, 2021 |
| Linux | libdbus-1-3 Ubuntu 20.04 LTS (focal) | 1.12.16-2ubuntu2.2 | [libdbus-1-3 1.12.16-2ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libdbus-1-3-1.12.16-2ubuntu2.2.md) | Feb 15, 2021 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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