# [Critical] Photon OS Security Update   
## Summary   
Advisory ID : PHSA-2021-3.0-0255    
Type : Security   
Severity : ['Critical']    
Issued on : 2021-06-17   
Affected Versions : Photon OS 3.0    
   
## Details   
An update of {'lz4'} packages of Photon OS has been released.   
   
## Affected Packages:    
### Critical    
lz4 - ['[CVE-2021-3520](https://nvd.nist.gov/vuln/detail/CVE-2021-3520)']    
   
## Solution     
Update the affected packages (tdnf update _package_)     
## Updated Packages Information    
lz4-1.9.3-2.ph3.x86_64.rpm , sha256 : d95049c7c8393987a97b8665a684ff73e076a1ed93d27e6a4e1c15cd569eb32e , size : 275K , build_date : Thu, 17 Jun 2021 10:00:19 PDT    
lz4-devel-1.9.3-2.ph3.x86_64.rpm , sha256 : 484dcea0fd7b7cdf8c59907c74a164d2dbd6f2cd99e25b6e69c0045b7cbf233c , size : 156K , build_date : Thu, 17 Jun 2021 10:00:19 PDT