Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c before 1e720f63dbafc093a8f5d519f05b67724993edd4; affected 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c before a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0; affected 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c before cca38f2102a4cd35eda8d48950df4817b4b24757; affected 7e70cb4978507cf31d76b90e4cfb4c28cad87f0c before 8697c431e297eb0d0ab13dda6bc172b48a34f05c |
| Linux / Linux | affected 2.6.38; unaffected 0 before 2.6.38; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.