CVE-2026-53016
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile — higher than 3% of all known CVEs
Summary
In the Linux kernel, a vulnerability was found in the CCP (crypto: ccp) driver. The ccp_aes_complete() function restored 16 bytes (AES_BLOCK_SIZE) into the IV buffer, while the RFC3686 algorithm uses an 8-byte IV, causing a buffer overrun.
Risk Assessment
Buffer overrun in the IV buffer may lead to unpredictable system behavior, potentially allowing a local attacker to escalate privileges or destabilize the kernel.
Recommendation
Immediately update the Linux kernel to a version containing the fix that uses crypto_skcipher_ivsize() to copy only the correct IV length.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer. Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.