# libjavascriptcoregtk-4.0-18 2.20.5-0ubuntu0.18.04.1: libjavascriptcoregtk-4.0-18 2.20.5-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)

libjavascriptcoregtk-4.0-18 2.20.5-0ubuntu0.18.04.1, released August 5, 2018, fixes 14 CVEs in libjavascriptcoregtk-4.0-18. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-bionic-libjavascriptcoregtk-4.0-18-2.20.5-0ubuntu0.18.04.1
- Platform: Linux
- Released: Aug 5, 2018
- Priority: High (Closes CVE-2018-4246, high severity)
- CVEs: 14, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libjavascriptcoregtk-4.0-18](https://patchblox.com/security/data/product/linux/libjavascriptcoregtk-4.0-18.md) | Ubuntu 18.04.6 LTS (bionic) | 2.20.5-0ubuntu0.18.04.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2018-4246](https://patchblox.com/security/data/cve/CVE-2018-4246.md) | High | iTunes: An issue was discovered in certain Apple products. | 8.8 | 0.0297 |  |
| [CVE-2018-4262](https://patchblox.com/security/data/cve/CVE-2018-4262.md) | High | iTunes: In Safari before 11.1.2, iTunes before 12.8 for Windows, iOS before 11.4.1, tvOS before 11.4.1, iCloud… | 8.8 | 0.0259 |  |
| [CVE-2018-4264](https://patchblox.com/security/data/cve/CVE-2018-4264.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0207 |  |
| [CVE-2018-4272](https://patchblox.com/security/data/cve/CVE-2018-4272.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0207 |  |
| [CVE-2018-4265](https://patchblox.com/security/data/cve/CVE-2018-4265.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0206 |  |
| [CVE-2018-4263](https://patchblox.com/security/data/cve/CVE-2018-4263.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0199 |  |
| [CVE-2018-4261](https://patchblox.com/security/data/cve/CVE-2018-4261.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0199 |  |
| [CVE-2018-4267](https://patchblox.com/security/data/cve/CVE-2018-4267.md) | High | iTunes: Multiple memory corruption issues were addressed with improved memory handling. | 8.8 | 0.0198 |  |
| [CVE-2018-4284](https://patchblox.com/security/data/cve/CVE-2018-4284.md) | High | iTunes: A type confusion issue was addressed with improved memory handling. | 8.8 | 0.0158 |  |
| [CVE-2018-4278](https://patchblox.com/security/data/cve/CVE-2018-4278.md) | Routine | iTunes: In Safari before 11.1.2, iTunes before 12.8 for Windows, iOS before 11.4.1, tvOS before 11.4.1, iCloud… | 4.3 | 0.0228 |  |
| [CVE-2018-4270](https://patchblox.com/security/data/cve/CVE-2018-4270.md) | Routine | iTunes: A memory corruption issue was addressed with improved memory handling. | 6.5 | 0.0207 |  |
| [CVE-2018-4273](https://patchblox.com/security/data/cve/CVE-2018-4273.md) | Routine | iTunes: Multiple memory corruption issues were addressed with improved input validation. | 6.5 | 0.0206 |  |
| [CVE-2018-4266](https://patchblox.com/security/data/cve/CVE-2018-4266.md) | Routine | iTunes: A race condition was addressed with additional validation. | 5.9 | 0.0178 |  |
| [CVE-2018-12911](https://patchblox.com/security/data/cve/CVE-2018-12911.md) | Routine | gir1.2-javascriptcoregtk-4.0: WebKitGTK+ 2.20.3 has an off-by-one error, with a resultant out-of-bounds write, in the get_simple_globs functions in... | n/a | 0.0173 |  |

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Data as of 2026-11-12T07:53:35Z 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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