CVE-2026-43074
eventpoll: defer struct eventpoll free to RCU grace period
HIGH 7.8EPSS 0.2%
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.
- Affected
- Linux
- CVSS v3.1 CNA
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.18% chance of exploitation in the next 30 days, 7th percentile
- Published
- 2026-05-06
- Updated
- 2026-10-16
Proof-of-concept exploits (2)
- PeronGH/badepoll-selinux-disabler8★ · 2026-07-18
- d1667018881/myroot7★ · 2026-10-10
Security advisories
- 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