The vulnerability of the dst_dev_rcu() function in the sk_setup_caps() file of the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the dstdevrcu function in the sksetupcaps file of the Linux operating system is related to the use of memory after it is freed. Exploiting this vulnerability could allow an attacker to cause a service failure...

net: use dst_dev_rcu() in sk_setup_caps()

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CVE-2025-40170

In the Linux kernel, the following vulnerability has been resolved: net: use dstdevrcu in sksetupcaps Use RCU to protect accesses to dst-dev from sksetupcaps and skdstgsomaxsize. Also use dstdevrcu in ip6dstmtumaybeforward, and ipdstmtumaybeforward. ip4dsthoplimit can use dstdevnetrcu...