Linux · Linux Kernel · CVE-2026-23169
**Name of the Vulnerable Software and Affected Versions**
Linux kernel (affected versions not specified)
**Description**
A race condition exists in the `mptcp pm nl flush addrs doit()` function within the Linux kernel’s MPTCP implementation. This issue stems from the use of `list splice init()` which is not RCU ready, leading to potential crashes reported by syzbot and Eulgyu Kim in functions such as `mptcp pm nl get local id()` and `mptcp pm nl is backup()`. The root cause is the improper use of `list splice init rcu()` while holding a spinlock.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.