An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation.
22.07.5-2ubuntu1.623.13.9-2ubuntu6.123.13.9-8ubuntu5.20.6.35-0ubuntu7.3+esm40.6.40-2ubuntu11.6+esm20.6.45-1ubuntu1.3+esm20.6.55-0ubuntu12~20.04.7+esm1Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H