KEYS: encrypted: fix integer overflow of datablob_len

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.

Source published

6 Oct 2026 08:44:57 UTC

Source modified

19 Oct 2026 09:15:54 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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