Dear deepin Users and Community Members, A local privilege escalation vulnerability codenamed ActPedit (also known as pedit COW) has recently been disclosed in the Linux kernel. This vulnerability falls under the same category of page cache write vulnerabilities as the previously disclosed Dirty Frag and Copy Flaws. An attacker with low-privilege local access can exploit this flaw to tamper with the page cache of read-only files, escalate privileges and gain root access. Proof-of-Concept (PoC) codes and detailed exploitation techniques for this vulnerability have been released to the public. Given its high severity and broad impact, we strongly recommend all users ...Read more