[SRU Justification] RM Memory Management Double Free Privilege Escalation Vulnerability Introduced by 8e7e70522d760c4ccd4cd370ebfa0ba69e006c6e (v3.3) Fixed in v5.9 [Test Plan] none [Where problems could occur] Released in stable kernels: linux-4.19.y linux-5.4.y linux-5.7.y linux-5.8.y [Other Info] None