Description
Memory safety bugs were reported in Firefox 53. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 54.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 54 | 54 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mozjs38 | No fix yet | — |
| Ubuntu 16.04 LTS | firefox | 54.0+build3-0ubuntu0.16.04.1 | USN-3315-1 |
| Ubuntu 14.04 LTS | firefox | 54.0+build3-0ubuntu0.14.04.1 | USN-3315-1 |
Advisories 1
- USN-3315-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026