In the Linux kernel, the following vulnerability has been resolved:
crypto: iaa - Fix out-of-bounds index in find_empty_iaa_compression_mode
The local variable 'i' is initialized with -EINVAL, but the for loop immediately overwrites it and -EINVAL is never returned.
If no empty compression mode can be found, the function would return the out-of-bounds index IAA_COMP_MODES_MAX, which would cause an invalid array access in add_iaa_compression_mode().
Fix both issues by returning either a valid index or -EINVAL.
Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:HI:NA:H7.1/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H