In the Linux kernel, the following vulnerability has been resolved:
KEYS: trusted: dcp: fix improper sg use with CONFIGVMAPSTACK=y
With vmalloc stack addresses enabled (CONFIGVMAPSTACK=y) DCP trusted keys can crash during en- and decryption of the blob encryption key via the DCP crypto driver. This is caused by improperly using sginitone() with vmalloc'd stack buffers (plainkeyblob).
Fix this by always using kmalloc() for buffers we give to the DCP crypto driver.