GHSA-22fx-6r9m-r8h9 is a medium-severity (CVSS 6.5) CWE-369 vulnerability in github.com/strukturag/libheif. 1 public exploit reference exists, so weaponization risk is real. A fix is available for github.com/strukturag/libheif — see the affected versions and patch details below.
libheif vulnerable to segmentation fault via floating point exception
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-22fx-6r9m-r8h9.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-22fx-6r9m-r8h9 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
github.com/strukturag/libheifReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
A Segmentation fault caused by a floating point exception exists in libheif 1.15.1 using crafted heif images via the heif::Fraction::round() function in box.cc, which causes a denial of service.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/strukturag/libheif | all versions | 1.15.2go get github.com/strukturag/libheif@v1.15.2 |
Affected Products
fedorafedoraprojectlibheifstrukturResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/strukturag/libheif, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/strukturag/libheif to 1.15.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-22fx-6r9m-r8h9 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Frequently Asked Questions
Is GHSA-22fx-6r9m-r8h9 in your dependencies?
Find it across Go, including transitive dependencies.