A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
Exploitability
AV:NAC:HPR:HUI:NScope
S:UImpact
C:NI:NA:L2.2/CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:LResource Management