CVE-2021-47186: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

Affected products

• Linux Linux Kernel: from 5.5, before 5.10.82 (fixed in 5.10.82); from 5.11, before 5.15.5 (fixed in 5.15.5); version 5.16 only

Published 2024-04-10. Last modified 2026-06-17.