CVE-2026-98222

Summary

In the Linux kernel, the following vulnerability has been resolved:

KEYS: encrypted: fix integer overflow of datablob_len

encrypted_key_alloc() stores datablob_len in a u16. It is computed from multiple string and payload lengths. If the result exceeds U16_MAX, the assignment truncates the allocation size. KASAN reports a 32760-byte slab-out-of-bounds write when __ekey_init() copies the master key description into the undersized buffer.

The total payload length stored in key->datalen is also a u16. Use check_add_overflow() to reject values that do not fit either destination, and use kzalloc_flex() for the flexible-array allocation.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < 1e720f63dbafc093a8f5d519f05b67724993edd4affected
LinuxLinux7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0affected
LinuxLinux7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < cca38f2102a4cd35eda8d48950df4817b4b24757affected
LinuxLinux7e70cb4978507cf31d76b90e4cfb4c28cad87f0c < 8697c431e297eb0d0ab13dda6bc172b48a34f05caffected
LinuxLinux2.6.38affected
LinuxLinux0 < 2.6.38unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References