# CVE-2019-20503: xul-ext-lightning: usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

CVE-2019-20503 is fixed in 14 products on 1 platform, first by firefox 74.0+build3-0ubuntu0.18.04.1, released March 10, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-20503
- Priority: Routine
- CVSS: 6.5 (Medium)
- EPSS: 0.0314
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2020

## Description

usrsctp before 2019-12-20 has out-of-bounds reads in sctp_load_addresses_from_init.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | chromium-browser Ubuntu 18.04.6 LTS (bionic) | 80.0.3987.149-0ubuntu0.18.04.1 | [chromium-browser 80.0.3987.149-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-chromium-browser-80.0.3987.149-0ubuntu0.18.04.1.md) | Mar 23, 2020 |
| Linux | chromium-browser-l10n Ubuntu 18.04.6 LTS (bionic) | 80.0.3987.149-0ubuntu0.18.04.1 | [chromium-browser-l10n 80.0.3987.149-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-chromium-browser-l10n-80.0.3987.149-0ubuntu0.18.04.1.md) | Mar 23, 2020 |
| Linux | chromium-chromedriver Ubuntu 18.04.6 LTS (bionic) | 80.0.3987.149-0ubuntu0.18.04.1 | [chromium-chromedriver 80.0.3987.149-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-chromium-chromedriver-80.0.3987.149-0ubuntu0.18.04.1.md) | Mar 23, 2020 |
| Linux | chromium-codecs-ffmpeg Ubuntu 18.04.6 LTS (bionic) | 80.0.3987.149-0ubuntu0.18.04.1 | [chromium-codecs-ffmpeg 80.0.3987.149-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-chromium-codecs-ffmpeg-80.0.3987.149-0ubuntu0.18.04.1.md) | Mar 23, 2020 |
| Linux | chromium-codecs-ffmpeg-extra Ubuntu 18.04.6 LTS (bionic) | 80.0.3987.149-0ubuntu0.18.04.1 | [chromium-codecs-ffmpeg-extra 80.0.3987.149-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-chromium-codecs-ffmpeg-extra-80.0.3987.149-0ubuntu0.18.04.1.md) | Mar 23, 2020 |
| Linux | firefox RHEL 8 | 0:68.6.0-1.el8_1 | [RHSA-2020:0820](https://patchblox.com/security/data/fix/linux/rhsa-2020-0820.md) | Mar 16, 2020 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 74.0+build3-0ubuntu0.18.04.1 | [firefox 74.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-74.0-build3-0ubuntu0.18.04.1.md) | Mar 10, 2020 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 74.0+build3-0ubuntu1 | [firefox 74.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-74.0-build3-0ubuntu1.md) | Mar 10, 2020 |
| Linux | firefox Ubuntu 24.10 (oracular) | 74.0+build3-0ubuntu1 | [firefox 74.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-firefox-74.0-build3-0ubuntu1.md) | Jan 16, 2026 |
| Linux | firefox Ubuntu 25.04 (plucky) | 74.0+build3-0ubuntu1 | [firefox 74.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-firefox-74.0-build3-0ubuntu1.md) | Jan 16, 2026 |
| Linux | firefox ol 8 | 0:68.6.0-1.0.1.el8_1 | [ELSA-2020-0820](https://patchblox.com/security/data/fix/linux/elsa-2020-0820.md) | Mar 16, 2020 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 74.0+build3-0ubuntu0.18.04.1 | [firefox-geckodriver 74.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-74.0-build3-0ubuntu0.18.04.1.md) | Mar 10, 2020 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 74.0+build3-0ubuntu1 | [firefox-geckodriver 74.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-74.0-build3-0ubuntu1.md) | Mar 10, 2020 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 74.0+build3-0ubuntu0.18.04.1 | [firefox-mozsymbols 74.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-74.0-build3-0ubuntu0.18.04.1.md) | Mar 10, 2020 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 74.0+build3-0ubuntu1 | [firefox-mozsymbols 74.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-74.0-build3-0ubuntu1.md) | Mar 10, 2020 |
| Linux | thunderbird RHEL 8 | 0:68.6.0-1.el8_1 | [RHSA-2020:0919](https://patchblox.com/security/data/fix/linux/rhsa-2020-0919.md) | Mar 23, 2020 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [thunderbird 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |
| Linux | thunderbird Ubuntu 24.10 (oracular) | 1:68.6.0+build2-0ubuntu1 | [thunderbird 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-thunderbird-1-68.6.0-build2-0ubuntu1.md) | Jan 16, 2026 |
| Linux | thunderbird Ubuntu 25.04 (plucky) | 1:68.6.0+build2-0ubuntu1 | [thunderbird 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-thunderbird-1-68.6.0-build2-0ubuntu1.md) | Jan 16, 2026 |
| Linux | thunderbird ol 8 | 0:68.6.0-1.0.1.el8_1 | [ELSA-2020-0919](https://patchblox.com/security/data/fix/linux/elsa-2020-0919.md) | Mar 23, 2020 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [thunderbird-gnome-support 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [thunderbird-mozsymbols 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [xul-ext-calendar-timezones 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [xul-ext-gdata-provider 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:68.6.0+build2-0ubuntu1 | [xul-ext-lightning 1:68.6.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-68.6.0-build2-0ubuntu1.md) | Mar 10, 2020 |

---

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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.