# [Critical] Photon OS Security Update   
## Summary   
Advisory ID : PHSA-2021-2.0-0357    
Type : Security   
Severity : ['Critical', 'Moderate']    
Issued on : 2021-06-15   
Affected Versions : Photon OS 2.0    
   
## Details   
An update of {'lz4', 'zeromq'} packages of Photon OS has been released.   
   
## Affected Packages:    
### Critical    
lz4 - ['[CVE-2021-3520](https://nvd.nist.gov/vuln/detail/CVE-2021-3520)']    
zeromq - ['[CVE-2021-20236](https://nvd.nist.gov/vuln/detail/CVE-2021-20236)']    
### Moderate    
zeromq - ['[CVE-2021-20234](https://nvd.nist.gov/vuln/detail/CVE-2021-20234)']   
   
## Solution     
Update the affected packages (tdnf update _package_)     
## Updated Packages Information    
lz4-1.9.2-2.ph2.x86_64.rpm , sha256 : 219675966ba691888f74d481f6169a475d41f34419833b6e00c0738de981fcce , size : 204K , build_date : Tue, 15 Jun 2021 10:02:05 PDT    
lz4-devel-1.9.2-2.ph2.x86_64.rpm , sha256 : 86b005ed0ec4a29b6efd31d53f83f9113b6916523da2dacc7e1e48c00d289ab0 , size : 115K , build_date : Tue, 15 Jun 2021 10:02:05 PDT    
zeromq-4.3.4-1.ph2.x86_64.rpm , sha256 : 86532878eff2b2bcedd4ba943edf129eb9aa1352640f246dbab61283438d3181 , size : 1.2M , build_date : Tue, 15 Jun 2021 10:02:03 PDT    
zeromq-devel-4.3.4-1.ph2.x86_64.rpm , sha256 : f2dd9e459f66f9cebbeec8edac366cc06d462c58baea00b472f274e689bea88c , size : 163K , build_date : Tue, 15 Jun 2021 10:02:03 PDT