CVE-2022-0847 on Linux Kernel

A security advisory was released affecting a version of the Linux Kernel used in FortiAuthenticator, FortiProxy & FortiSIEM:
CVE-2022-0847:
A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their …

advisory amp buffer cache cve cve-2022-0847 files flaw fortiproxy functions kernel linux linux kernel local page cache privileges security security advisory system version