krb5 -- Integer overflow vulnerabilities in PAC parsing

MITKRB5-SA-2022-001 Vulnerabilities in PAC parsing:

Due to an integer overflow vulnerabilities in PAC parsing
An authenticated attacker may be able to cause a KDC or kadmind
process to crash by reading beyond the bounds of allocated memory,
creating a denial of service.
On 32-bit platforms an authenticated attacker may be able to
cause heap corruption resulting in an RCE.