# CVE-2018-15853: xkbcomp: This update for xkbcomp fixes the following issues:  - CVE-2018-15863: NULL pointer dereference triggered by a a craf...

CVE-2018-15853 is fixed in 6 products on 1 platform, first by libxkbcommon-x11-0 0.8.0-1ubuntu0.1, released August 24, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-15853
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 24, 2018

## Description

This update for xkbcomp fixes the following issues:  - CVE-2018-15863: NULL pointer dereference triggered by a a crafted keymap file with a no-op modmask expression can   lead to a crash (bsc#1105832). - CVE-2018-15861: NULL pointer dereference triggered by a crafted keymap file that induces an `xkb_intern_atom` failure   can lead to a crash (bsc#1105832). - CVE-2018-15859: NULL pointer dereference triggered by a specially a crafted keymap file can lead to a crash   (bsc#1105832). - CVE-2018-15853: endless recursion triggered by a crafted keymap file that induces boolean negation can lead to a   crash (bsc#1105832).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libxkbcommon-x11-0 Ubuntu 18.04.6 LTS (bionic) | 0.8.0-1ubuntu0.1 | [libxkbcommon-x11-0 0.8.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxkbcommon-x11-0-0.8.0-1ubuntu0.1.md) | Aug 24, 2018 |
| Linux | libxkbcommon0 Ubuntu 18.04.6 LTS (bionic) | 0.8.0-1ubuntu0.1 | [libxkbcommon0 0.8.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxkbcommon0-0.8.0-1ubuntu0.1.md) | Aug 24, 2018 |
| Linux | xkbcomp Fedora 43 | 1.5.0-1.fc43 | [FEDORA-2025-3A9B79CA0E](https://patchblox.com/security/data/fix/linux/fedora-2025-3a9b79ca0e.md) | Dec 3, 2025 |
| Linux | xkbcomp opensuse-leap 15.6 | 1.4.1-150000.3.6.1 | [SUSE-SU-2025:4426-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4426-1.md) | Dec 17, 2025 |
| Linux | xkbcomp opensuse-leap 16.0 | 1.4.7-160000.3.1 | [OPENSUSE-SU-2026:20123-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20123-1.md) | Jan 28, 2026 |
| Linux | xkbcomp sles 15.6 | 1.4.1-150000.3.6.1 | [SUSE-SU-2025:4426-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4426-1.md) | Dec 17, 2025 |
| Linux | xkbcomp sles 15.7 | 1.4.1-150000.3.6.1 | [SUSE-SU-2025:4426-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4426-1.md) | Dec 17, 2025 |
| Linux | xkbcomp sles 16.0 | 1.4.7-160000.3.1 | [SUSE-SU-2026:20186-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20186-1.md) | Jan 28, 2026 |
| Linux | xkbcomp-debuginfo Fedora 43 | 1.5.0-1.fc43 | [FEDORA-2025-3A9B79CA0E](https://patchblox.com/security/data/fix/linux/fedora-2025-3a9b79ca0e.md) | Dec 3, 2025 |
| Linux | xkbcomp-debugsource Fedora 43 | 1.5.0-1.fc43 | [FEDORA-2025-3A9B79CA0E](https://patchblox.com/security/data/fix/linux/fedora-2025-3a9b79ca0e.md) | Dec 3, 2025 |
| Linux | xkbcomp-devel Fedora 43 | 1.5.0-1.fc43 | [FEDORA-2025-3A9B79CA0E](https://patchblox.com/security/data/fix/linux/fedora-2025-3a9b79ca0e.md) | Dec 3, 2025 |

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Data as of 2026-11-07T18:46:35Z 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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