Description
High Availability Linux Project Heartbeat 1.2.3 allows local users to overwrite arbitrary files via a symlink attack on temporary files.
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.
Debian
Security tracker ↗Advisories 1
- DSA-761-2 heartbeat - insecure temporary files Debian Security (DSA / DLA) · Mar 9, 2026