CVE-2026-43074
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.48% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/07712db80857d5d09ae08f3df85a708ecfc3b61fPatch
- https://git.kernel.org/stable/c/5b1173b165421561db29f30afc7e97d940a398a9Patch
- https://git.kernel.org/stable/c/7e8083f5eeedab0f460063b9c2c14c9a4e71a427Patch
- https://git.kernel.org/stable/c/902120be4f44947df6311002addc7faf69bdbff1
- https://git.kernel.org/stable/c/a6566cd33f6f967a7651ebf2ce0dd31572e319cfPatch
- https://git.kernel.org/stable/c/a6d57084372161f86660bc4607784420e00efe2c
- https://git.kernel.org/stable/c/ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.