Database/Kernel, userspace & hypervisor
polkit (pkexec): PwnKit: local privilege escalation to root via argv handling
CVE-2021-4034Kernel, userspace & hypervisorKnown exploitedcurated
Impact
PwnKit: local privilege escalation to root via argv handling; no exploit prerequisites [KEV]
Who can reach it
Local user, incl. any shell inside a privileged/host-namespace container
What to do
Package update only; no reboot. Interim mitigation: chmod 0755 /usr/bin/pkexec (strip setuid)
References
This entry is curated: imported from vendor advisories with machine assistance, not yet individually verified. Confirm against your vendor's advisory before acting, and report anything wrong.