In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.
5.9.1-1+deb11u55.9.8-5+deb12u26.0.1-6+deb13u26.0.3-1Exploitability
AV:NAC:HPR:NUI:NScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H