CVE-2026-43074

Description

In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.

References

• https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61f
• https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9
• https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427
• https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cf
• https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322